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this product conforms to specifications per the terms of the ramtron standard warranty. the product has completed ramtrons internal qualification testing and has reached production status. cypress semiconductor corporation ? 198 champion court ? san jose, ca 95134 - 1709 ? 408 - 943 - 2600 document number: 001 - 844 54 rev. * b revised june 30 , 2013 fm 24c64b 64kb serial 5v f - ram memory features 64k bit ferroelectric nonvolatile ram organized as 8,192 x 8 bits high endurance 1 trillion (10 12 ) read/writes 38 year data retention nodelay? writes advanced high - reliability ferroelectric process fast two - wire serial interface up to 1 mhz maximum bus frequency direct hardware replacement for eeprom supports legacy timing for 100 khz & 400 khz low power operati on 5v operation 1 0 0 a active current (100 khz) 4 a (typ.) standby current industry standard configuration industrial temperature - 40 c to +85 c 8 - pin green /rohs soic ( - g) description the fm 24c64b is a 64 - kilobit nonvolatile memory employing an advanced ferroelectric process. a ferroelectric random access memory or fram is nonvolatile and performs reads and writes like a ram. it provides reliable data retention for 38 years while eliminating the co mplexities, overhead, and system level reliability problems caused by eeprom and other nonvolatile memories. the fm 24c64b performs write operations at bus speed. no write delays are incurred. data is written to the memory array in the cycle after it has b een successfully transferred to the device. the next bus cycle may commence immediately without the need for data polling . the fm 24c64b is capable of supporting 10 12 read/write cycles, or a million times more write cycles than eeprom. these capabilities make the fm 24c64b ideal for nonvolatile memory applications requiring frequent or rapid writes. examples range from data collection where the number of write cycles may be critical, to demanding industrial controls where the long write time of eeprom can c ause data loss. the combination of features allows more frequent data writes with less overhead for the system. the fm 24c64b provides substantial benefits to users of serial eeprom, yet these benefits are available in a hardware drop - in replacement. the fm 24c64b is available in an industry standard 8 - pin soic package and uses a familiar two - wire protocol. the specifications are guaranteed over an industrial temperature range of - 40c to +85c. pin configuration pin names function a0 - a2 device select address sda serial data/address scl serial clock wp write protect vss ground vdd supply voltage ordering information fm24c64b - g green/rohs 8 green/rohs 8 a0 a1 a2 vss vdd wp scl sda 1 2 3 4 8 7 6 5
fm24c64b document number: 001 - 844 5 4 rev. * b page 2 of 1 5 figure 1. fm 24c64b block diagram pin description pin name i/o pin description a0 - a2 input address 2 - 0: these pins are used to select one of up to 8 devices of the same type on the same two - wire bus. to select the device, the address value on the three pins must match the corresponding bits contained in the device address. the address pins are pulled down internally. sda i/o serial data address: this is a bi - directional pin used to shift serial data and addresses for the two - wire interface. it employs an open - drain output and is intended to be wire - ord with other devices on the two - wire bus. the input buffer incorporates a schmitt trigger for noise immunity and the output driver includes slope control f or falling edges. a pull - up resistor is required. scl input serial clock: the serial clock input for the two - wire interface. data is clocked out of the device on the scl falling edge, and clocked in on the scl rising edge. the scl input also incorporates a schmitt trigger input for improved noise immunity. wp input write protect: when wp is high, the entire array is write - protected. when wp is low, all addresses may be written . this pin is pulled down internally. vdd supply supply voltage: 5v vss supply ground address latch 1,024 x 64 fram array 8 sda counter serial to parallel converter control logic scl wp a0-a2 data latch
fm24c64b document number: 001 - 844 5 4 rev. * b page 3 of 1 5 overview the fm 24c64b is a serial fram memory. the memory array is logically organized as a 8,192 x 8 bit memory array and is accessed using an industry standard two - wire interface. functional operation of the fram is similar to serial eeproms. the major difference between the fm 24c64b and a serial eeprom with the same pinout relates to its superior write performance. memory architecture when accessing the fm 24c64b , the user addresses 8,192 locations each with 8 data bits. these data bits are shifted serially. the 8,192 addresses are accessed using the two - wire protocol, which includes a slave address (to distinguish from other non - memory devices), and an extended 16 - bit address. only the lower 13 bits are used by the decoder for accessing the memory. the upper three add ress bits should be set to 0 for compatibility with larger devices in the future. the memory is read or written at the speed of the two - wire bus. unlike an eeprom, it is not necessary to poll the device for a ready condition since writes occur at bus spee d. that is, by the time a new bus transaction can be shifted into the part, a write operation is complete. this is explained in more detail in the interface section below. users can expect several obvious system benefits from the fm 24c64b due to its fast write cycle and high endurance as compared with eeprom. however there are less obvious benefits as well. for example in a high noise environment, the fast - write operation is less susceptible to corruption than an eeprom since it is completed quickly. by c ontrast, an eeprom requiring milliseconds to write is vulnerable to noise during much of the cycle. note that the fm 24c64b contains no power management circuits other than a simple internal power - on reset. it is the users responsibility to ensure that v dd is within data sheet tolerances to prevent incorrect operation. two - wire interface the fm 24c64b employs a bi - directional two - wire bus protocol using few pins and little board space. figure 2 illustrates a typical system configuration using the fm 24c64b in a microcontroller - based system. the industry standard two - wire bus is familiar to many users but is described in this section. by convention, any device that is sending data onto the bus is the transmitter while the target device for this data is the receiver. the device that is controlling the bus is the master. the master is responsible for generating the clock signal for all operations. any device on the bus that is being controlled is a slave. the fm 24c64b always is a slave device. the bus proto col is controlled by transition states in the sda and scl signals. there are four conditions: start, stop, data bit, and acknowledge. figure 3 illustrates the signal conditions that specify the four states. detailed ti ming diagrams are shown in the electri cal s pecifications section . figure 2. typical system configuration microcontroller sda scl fm 24 c 64 b a 0 a 1 a 2 sda scl fm 24 c 64 b a 0 a 1 a 2 vdd rmin = 1 . 8 kohm rmax = tr / cbus
fm24c64b document number: 001 - 844 5 4 rev. * b page 4 of 1 5 figure 3. data transfer protocol stop condition a stop condition is indicated when the bus master driv es sda from low to high while the scl signal is high. all operations must end with a stop condition. if an operation is pending when a stop is asserted, the operation will be aborted. the master must have control of sda (not a memory read) in order to asse rt a stop condition. start condition a start condition is indicated when the bus master drives sda from high to low while the scl signal is high. all read and write transactions begin with a start condition. an operation in progress can be aborted by asserting a start condition at any time. aborting an operation using the start condition will ready the fm 24c64b for a new operation. if during operation the power supply drops below the specified v dd minimum, the system should issue a start condition pr ior to performing another operation data/address transfer all data transfers (including addresses) take place while the scl signal is high. except under the two conditions described above, the sda signal should not change while scl is high. acknowledge th e acknowledge takes place after the 8 th data bit has been transferred in any transaction. during this state the transmitter should release the sda bus to allow the receiver to drive it. the receiver drives the sda signal low to acknowledge receipt of the b yte. if the receiver does not drive sda low, the condition is a no - acknowledge and the operation is aborted. the receiver could fail to acknowledge for two distinct reasons. first, if a byte transfer fails, the no - acknowledge ends the current operation so that the device can be addressed again. this allows the last byte to be recovered in the event of a communication error. second and most common, the receiver does not acknowledge the data to deliberately end an operation. for example, during a read operat ion, the fm 24c64b will continue to place data onto the bus as long as the receiver sends acknowledges (and clocks). when a read operation is complete and no more data is needed, the receiver must not acknowledge the last byte. if the receiver acknowledges the last byte, this will cause the fm 24c64b to attempt to drive the bus on the next clock while the master is sending a new command such as a stop command. slave address the first byte that the fm 24c64b expects after a start condition is the slave address . as shown in figure 4, the slave address contains the slave id (device type), the device select address bits, and a bit that specifies if the transaction is a read or a write. bits 7 - 4 define the device type and must be set to 1010b for the fm 24c64b . thes e bits allow other types of function types to reside on the 2 - wire bus within an identical address range. bits 3 - 1 are the select bits which are equivalent to chip select bits. they must match the corresponding value on the external address pins to select the device. up to eight fm 24c64b s can reside on the same two - wire bus by assigning a different address to each. bit 0 is the read/write bit. a 1 indicates a read operation, and a 0 indicates a write.
fm24c64b document number: 001 - 844 5 4 rev. * b page 5 of 1 5 figure 4. slave address addressing overview after the fm 24c64b (as receiver) acknowledges the device address, the master can place the memory address on the bus for a write operation. the address requires two bytes. the first is the msb (upper byte). since the de vice uses only 13 address bits, the value of the upper three bits are dont care. following the msb is the lsb (lower byte) with the remaining eight address bits. the address value is latched internally. each access causes the latched address value to be i ncremented automatically. the current address is the value that is held in the latch, either a newly written value or the address following the last access. the current address will be held as long as power remains or until a new value is written. reads al ways use the current address. a random read address can be loaded by beginning a write operation as explained below. after transmission of each data byte and just prior to the acknowledge, the fm 24c64b increments the internal address latch. this allows t he next sequential byte to be accessed with no additional addressing externally. after the last address (1fffh) is reached, the address latch will roll over to 0000h. there is no limit to the number of bytes that can be accessed with a single read or write operation. data transfer after the address information has been transmitted, data transfer between the bus master and the fm 24c64b can begin. for a read operation, the fm 24c64b will place 8 data bits on the bus then wait for an acknowledge from the maste r. if the acknowledge occurs, the fm 24c64b will transfer the next sequential byte. if the acknowledge is not sent, the fm 24c64b will end the read operation. for a write operation, the fm 24c64b will accept 8 data bits from the master and then send an acknow ledge. all data transfer occurs msb (most significant bit) first. memory operation the fm 24c64b is designed to operate in a manner very similar to other 2 - wire interface memory products. the major differences result from the higher performance write capability of fram technology. these improvements result in some differences between the fm 24c64b and a similar configuration eeprom during writes. the complete operation for both writes and reads is explained below. write operation all writes begin with a device address, then a memory address. the bus master indicates a write operation by setting the ls b of the device address to a 0. after addressing, the bus master sends each byte of data to the memory and the memory generates an acknowledge condition. any number of sequential bytes may be written. if the end of the address range is reached internally, the address counter will wrap from 1fffh to 0000h. unlike other nonvolatile memory technologies, there is no write delay with fram. the entire memory cycle occurs in less time than a single bus clock. therefore, any operation including a read or write ca n occur immediately following a write. acknowledge polling, a technique used with eeproms to determine if a write is complete is unnecessary and will always return a ready condition. internally, the actual memory write occurs after the 8 th data bit is tr ansferred. it will be complete before the acknowledge is sent. therefore, if the user desires to abort a write without altering the memory contents, this should be done using a start or stop condition prior to the 8 th data bit. the fm 24c64b uses no page bu ffering. the memory array can be write protected using the wp pin. pulling the wp pin high will write - protect the entire array . the fm 24c64b will not acknowledge data bytes that are written to protected addresses. in addition, the address counter will no t increment if writes are attempted . pulling wp low (v ss ) will de activate this feature. figures 5 and 6 illustrate both a single - byte and multiple - byte write cases. 1 0 1 0 a 2 a 1 a 0 r / w s l a v e i d d e v i c e s e l e c t 7 6 5 4 3 2 1 0
fm24c64b document number: 001 - 844 5 4 rev. * b page 6 of 1 5 figure 5. byte write figure 6. multiple - byte write read operation there are two basic types of read operations. they are current address read and selective address read. in a current address read, the fm 24c64b uses the internal address latch to sup ply the address. in a selective read, the user performs a procedure to set the address to a specific value. current address & sequential read the fm 24c64b uses an internal latch to supply the address for a read operation. a current address read uses the e xisting value in the address latch as a starting place for the read operation. the system reads from the address immediately following that of the last operation. to perform a current address read, the bus master supplies a device address with the lsb set to 1. this indicates that a read operation is requested. after receiving the complete device address, the fm 24c64b will begin shifting out data from the current address on the next clock. the current address is the value held in the internal address la tch. beginning with the current address, the bus master can read any number of bytes. thus, a sequential read is simply a current address read with multiple byte transfers. after each byte the internal address counter will be incremented. each time the b us master acknowledges a byte, this indicates that the fm 24c64b should read out the next sequential byte. there are four ways to properly terminate a read operation. failing to properly terminate the read will likely create a bus contention as the fm 24c64b attempts to read out additional data onto the bus. the four valid methods are: 1. the bus master issues a no - acknowledge in the 9 th clock cycle and a stop in the 10 th clock cycle. this is illustrated in figures 7 - 9. this is the preferred method. 2. the b us master issues a no - acknowledge in the 9 th clock cycle and a start in the 10 th . 3. the bus master issues a stop in the 9 th clock cycle. 4. the bus master issues a start in the 9 th clock cycle. if the internal address reaches 1fffh, it will wrap around to 00 00h on the next read cycle. figures 7 and 8 show the proper operation for current address reads. selective (random) read there is a simple technique that allows a user to select a random address location as the starting point for a read operation. this in volves using the first three bytes of a write operation to set the internal address followed by subsequent read operations. to perform a selective read, the bus master sends out the device address with the lsb set to 0. this specifies a write operation. according to the write protocol, the bus master then sends the address bytes that are loaded into the internal address latch. after the fm 24c64b acknowledges the address, the bus s a slave address 0 address msb a data byte a p by master by fm 24 c 64 b start address & data stop acknowledge address lsb a s a slave address 0 address msb a data byte a p by master by fm 24 c 64 b start address & data stop acknowledge address lsb a data byte a
fm24c64b document number: 001 - 844 5 4 rev. * b page 7 of 1 5 master issues a start condition. this simultaneously aborts the write operati on and allows the read command to be issued with the device address lsb set to a 1. the operation is now a current address read. figure 7. current address read figure 8. s equential read figure 9. selective (random) read endurance the fm24c64b internally operates with a read and restore mechanism. therefore, endurance cycles are applied for each read or write cycle. the memory architecture is based on an array of rows and columns. each read or write access causes an endurance cycle for an entire row. in the fm24c64b, a row is 64 bits wide. every 8 - byte boundary marks the beginning of a new row. endurance can be optim ized by ensuring frequently accessed data is located in different rows . regardless, fram read and write endurance is effectively unlimited at the 1mhz two - wire speed. even at 3000 accesses per second to the same segment, 10 years time will elapse before 1 trillion endurance cycles occur. s a slave address 1 data byte 1 p by master by fm 24 c 64 b start address stop acknowledge no acknowledge data s a slave address 1 data byte 1 p by master by fm 24 c 64 b start address stop acknowledge no acknowledge data data byte a acknowledge s a slave address 1 data byte 1 p by master by fm 24 c 64 b start address stop no acknowledge data s a slave address 0 address msb a start address acknowledge address lsb a x
fm24c64b document number: 001 - 844 5 4 rev. * b page 8 of 1 5 electrical specifications absolute maximum ratings symbol description ratings v dd power supply voltage with respect to v ss - 1.0v to +7.0v v in voltage on any signal pin with respect to v ss - 1.0v to +7.0v and v in < v dd +1.0v * t stg storage t emperature - 55 c to + 125 c t lead lead t emperature (soldering, 10 seconds) 26 0 c v esd electrostatic discharge voltage - human body model (aec - q100 - 002 rev. e) - charged device model (aec - q100 - 011 rev. b) - machine model ( a ec - q100 - 003 rev. e ) 4kv 1.25kv 200v package moisture sensitivity level msl - 1 * exception: the v in < v dd +1.0v restriction does not apply to the scl and sda inputs. stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only, and the functional operation of the device at these or any other conditions above those listed in the operational secti on of this specificat ion is not implied. exposure to absolute maximum ratings conditions for extended periods may affect device reliability . dc operating conditions (t a = - 40 c to + 85 c, v dd = 4.5v to 5.5v unless otherwise specified) symbol parameter min typ max units notes v dd main power supply 4.5 5.0 5.5 v i dd vdd supply current @ scl = 100 khz @ scl = 400 khz @ scl = 1 mhz 100 200 400 a a a 1 i sb standby current 4 10 a 2 i li input leakage current 1 a 3 i lo output leakage current 1 a 3 v il input low voltage - 0.3 0.3 v dd v v ih input high voltage 0.7 v dd v dd + 0.3 v v ol output low voltage @ i ol = 3 ma 0.4 v r in input resistance (wp , a2 - a0 ) for v in = v il (max) for v in = v ih (min) 40 1 k m 5 v hys input hysteresis 0.05 v dd v 4 notes 1. scl toggling between v dd - 0.3v and v ss , other inputs v ss or v dd - 0.3v 2. scl = sda = v dd . all inputs v ss or v dd . stop command issued. 3. v in or v out = v ss to v dd . does not apply to wp, a2 - a0 pins. 4. this parameter is characterized but not tested. 5. the input pull - down circuit is strong (40k ) when the input voltage is below v il and much weaker (1m ) when the input voltage is above v ih .
fm24c64b document number: 001 - 844 5 4 rev. * b page 9 of 1 5 ac parameters (t a = - 40 c to + 85 c, v dd = 4.5v to 5.5v, c l = 100 pf unless otherwise specified) symbol parameter min max min max min max units notes f scl scl clock frequency 0 100 0 400 0 1000 khz t low clock low period 4.7 1.3 0.6 s t high clock high period 4.0 0.6 0.4 s t aa scl low to sda data out valid 3 0.9 0.55 s t buf bus free before new transmission 4.7 1.3 0.5 s t hd:sta start condition hold time 4.0 0.6 0.25 s t su:sta start condition setup for repeated start 4.7 0.6 0.25 s t hd:dat data in hold 0 0 0 ns t su:dat data in setup 250 100 100 ns t r input rise time 1000 300 300 ns 1 t f input fall time 300 300 100 ns 1 t su: sto stop condition setup 4.0 0.6 0.25 s t dh data output hold (from scl @ vil) 0 0 0 ns t sp noise suppression time constant on scl, sda 50 50 50 ns notes : all scl specifications as well as start and stop conditions apply to both read and write operations. 1 this parameter is periodically sampled and not 100% tested. capacitance ( t a = 25 c, f=1.0 mhz, v dd = 5v) symbol parameter max units notes c i/o input/output capacitance (sda) 8 pf 1 c in input capacitance 6 pf 1 notes 1 this parameter is periodically sampled and not 100% tested. power cycle timing power cycle timing ( t a = - 40 c to +85 c , v dd = 4.5v to 5.5v unless otherwise specified ) symbol parameter min max units notes t pu power up (v dd min) to first access (start condition) 1 0 - ms t pd last access (stop condition) to power down (v dd min) 0 - s t vr v dd rise time 30 - s/v 1 t vf v dd fall time 3 0 - s/v 1 notes 1. sl ope measured at any point on v dd waveform . v d d m i n . v d d s d a , s c l t v r t p d t p u t v f
fm24c64b document number: 001 - 844 5 4 rev. * b page 10 of 1 5 ac test conditions equivalent ac load circuit input pulse levels 0.1 v dd to 0.9 v dd input rise and fall times 10 ns input and output timing levels 0.5 v dd diagram notes all start and stop timing parameters apply to both read and write cycles. clock specific ations are identical for read and write cycles. write timing parameters apply to slave address, word address, and write data bits. functional relationships are illustrated in the relevant data sheet sections. these diagrams illustrate the timing parameters only. read bus timing write bus timing data retention symbol parameter min max units notes t dr @ +85oc 10 - years @ +80oc 19 - years @ +75oc 38 - years t su:sda start t r t f stop start t buf t high 1/fscl t low t sp t sp acknowledge t hd:dat t su:d at t aa t dh scl sda t su:sto start stop start acknowledge t aa t hd:dat t hd:sta t su:dat scl sda 5.5v output 1700 100 pf
fm24c64b document number: 001 - 844 5 4 rev. * b page 11 of 1 5 mechanical drawing 8 - pin soic (jedec standard ms - 012 variation aa) refer to jedec ms - 012 for complete dimensions and notes. all dimensions in millimeters . soic package marking scheme legend: xx xx xx= part number, p= package type r=rev code, lllllll= lot code ric=ramtron intl corp, yy=year, ww=work week example: fm 24c64b , green soic package, year 2010, work week 47 fm 24c64b - g a 00002g1 ric1047 xxxx xxx - p ll llll l ricyyww p i n 1 3 . 9 0 0 . 1 0 6 . 0 0 0 . 2 0 4 . 9 0 0 . 1 0 0 . 1 0 0 . 2 5 1 . 3 5 1 . 7 5 0 . 3 3 0 . 5 1 1 . 2 7 0 . 1 0 m m 0 . 2 5 0 . 5 0 4 5 0 . 4 0 1 . 2 7 0 . 1 9 0 . 2 5 0 - 8 r e c o m m e n d e d p c b f o o t p r i n t 7 . 7 0 0 . 6 5 1 . 2 7 2 . 0 0 3 . 7 0
fm24c64b document number: 001 - 844 5 4 rev. * b page 12 of 1 5 revision history revision date summary 1.0 11/ 10 /2010 initial release 1.1 12/20 /2010 changed v ih (max) to v dd +0.3v. 1.2 2/7/2011 added esd ratings. 1.3 2/15/2011 changed t pu and t vf spec limit s. 3.0 1/6/2012 changed to production status. changed t vf spec. updat ed wp pin description.
fm24c64b document number: 001 - 844 5 4 rev. * b page 13 of 1 5 err ata all errata for this product are fixed effective date code 1 148 (yy=1 1 , ww= 48 ). for more information refer to datasheet 001 - 8 44 5 4 rev. * a or contact cypress technical support at http://www.cypress.com/support .
fm24c64b document number: 001 - 844 5 4 rev. * b page 14 of 1 5 document history document title: fm24 c64b 64 k b serial 5v f - ram memory document number: 001 - 844 5 4 revision ecn orig. of change submission date description of change ** 3902204 gvch 02/25 /2013 new spec *a 3996669 gvch 05/13/2013 added appendix a - errata for fm24 c64b * b 4045469 gvch 06/30/2013 all errata items are fixed an d the errata is removed.
fm24c64b document number: 001 - 844 5 4 rev. * b page 15 of 1 5 sales, solutions, and legal information worldwide sales and design support cypress maintains a worldwide network of offices, solution centers, manufacturers representatives, and distributors. to find the office closest to you, visit us at cypress locations . products automotive cypress.com/go /a ut omotive clocks & buffers cypress.com/go/clocks interface cypress.com/go /i nterface lighting & power control cypress.com/go/powerpsoc cypress.com/go/plc memory cypress.com/go/memory psoc cypress.com/go/psoc touch sensing cypress.com/go/touch usb controllers cypress.com/go/usb psoc ? solutions psoc.cypress.com/solutions psoc 1 | psoc 3 | psoc 5 cypress developer community community | forums | blogs | video | training technical support cypress.com/go/support ramtron is a registered trademark and nodelay? is a trademark of cypress semiconductor corp. all other trademarks or registered trademarks referenced herein are the property of their respective owners. ? cypress semi conductor corporation, 2011 - 2013 . the information contained herein is subject to change without notice. cypress semiconductor corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a cypress p roduct. nor does it convey or imply any license under patent or other rights. cypress products are not warranted nor intended to be used for medi cal, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with cypr ess. furthermore, cypress does not authorize its products for use as critical components in life - support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. the inclusion of cypress products in lif e - support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies cypress against all charges. this source code (software and/or firmware) is owned by cypress semiconductor corporation (cypress) and is pro tected by and subject to worldwide patent protection (united states and foreign), united states copyright laws and international treaty provisions. cy press hereby grants to licensee a personal, non - exclusive, non - transferable license to copy, use, modify, create derivative works of, and compile the cypress source code and derivative works for the sole purpose of creating custom software and or firmware in support of licen see product to be used only in conjunction with a cypress integrated circuit as specifi ed in the applicable agreement. any reproduction, modification, translation, compilation, or representation of this source code except as specified above is prohibited without the express w ritten permission of cypress. disclaimer: cypress makes no warranty of any kind, express or implied, with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. cypress reserves the right to make changes without further notice to the material s described herein. cypress does not assume any liability arising out of the application or use of any product or circuit described herein. cypress does not authorize it s products for use as critical components in life - support systems where a malfunction o r failure may reasonably be expected to result in significant injury to the user. the inclusion of cypress product in a life - support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies cypress against all charges. use may be limited by and subject to the applicable cypress software license agreement.

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