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1/13 msm6545/6575/6545l/6575l ? semiconductor general description msm6545/6575/6545l/6575l is a 4-bit, low-power microcontroller manufactured in a cmos silicon gate process. the microcontroller can be initialized and operated at a low supply voltage of 0.9 v. this single device contains a crystal oscillator circuit, voltage converter circuits, a time base counter, a rom, a ram, a stack ram, i/o ports, interrupt function components, a serial i/o port, a buzzer output circuit, and an updown counter. this ic is driven by one battery and is well suited to products that need to be operated under low power consumption. features ? the ic can be initialized and operated even at a low voltage of 0.9 v. ? low power consumption ? rom : 4096 words 17 bits (msm6545/6545l) 2048 words 17 bits (MSM6575/6575l) ? ram : 256 words 4 bits (msm6545/6545l) 128 words 4 bits (MSM6575/6575l) ? i/o port input-output port : 7 ports 4 bits input port : 1 port 4 bits ? interrupt functions (real-time interrupt, external interrupt, and serial interrupt) ? serial i/o port : 8-bit sync communication ? buzzer output circuit ? 4-bit decimal updown counter ? 73 instructions ? minimum instruction execution time : 61 m s ? operation under single 1.5 v power supply (msm6545/6575) a mask option allows the 3 v power supply to be used (msm6545l/6575l) ? built-in 32.768 khz crystal oscillator circuit ? package options: 44-pin plastic qfp (qfp44-p-910-0.80-k) : (product name : msm6545/6545l- gs-k) 44-pin plastic qfp (qfp44-p-910-0.80-2k) : (product name : msm6545/6545l- gs-2k) 44-pin plastic qfp (qfp44-p-910-0.80-k) : (product name : MSM6575/6575l- gs-k) 44-pin plastic qfp (qfp44-p-910-0.80-2k) : (product name : MSM6575/6575l- gs-2k) chip indicates a code number. ? semiconductor msm6545/6575/6545l/6575l operatable at 0.9 v and built-in buzzer circuit 4-bit microcontroller e2e0019-38-94 this version: sep. 1998 previous version: mar. 1996
2/13 msm6545/6575/6545l/6575l ? semiconductor block diagram p7.3 p7.2 p7.1 p7.0 p6.3 p6.2 p6.1 p6.0 p5.3 p5.2 p5.1 p5.0 p4.3 p4.2 p4.1 p4.0 p3.3 p3.2 p3.1 p3.0 p2.3 p2.2 p2.1 p2.0 p1.3 p1.2 p1.1 p1.0 p0.3 p0.2 p0.1 p0.0 xt xtb port7 port6 port5 port4 port3 port2 port1 port0 osc tmout time base counter system clock generator cclk bu/d 4-bit bcd counter ccnt pgconh pgconl sin sout sckl mode pcziox pchzx0 pciox0 pchz0 pcio0 scnd0 scnd1 serial i/o sbffl sbffh d-bus eif eirt irqrt fiex irqex pnex irqsio prio interrupt control ram msm6545/6545l...256 4 bits MSM6575/6575l...128 4 bits page work adrs program rom msm6545/6545l ... 4096 17 bits MSM6575/6575l ... 2048 17 bits instruction register instruction decoder stack ram program counter adder frmt flag s-bus acc a-bus alu mpx tempo buzzer mdth mdtl voltage regulator bd v dd v ss1 v ss2 v ee v cp v cm
3/13 msm6545/6575/6545l/6575l ? semiconductor pin configuration (top view) 33 32 31 30 29 28 27 26 25 24 23 1 2 3 4 5 6 7 8 9 10 11 p4.0 p4.1 p4.2 p4.3 reset test1 test2 test3 p7.3/cclk p7.2/bu/d p7.1/sin p1.1 p1.0 p0.3 p0.2 p0.1 p0.0 p5.0 p5.1 p5.2 p5.3 bd 44 43 42 41 40 39 38 37 36 35 34 p3.3 p3.2 p3.1 p3.0 p2.3 v dd p2.2 p2.1 p2.0 p1.3 p1.2 12 13 14 15 16 17 18 19 20 21 22 p7.0/sout p6.3/ sclk p6.0 xtb xt v dd v ss1 v cm v cp v ss2 v ee 44-pin plastic qfp notes: 1. p6.3, p7.0 and p7.1 also function as serial port pins. p7.2, and p7.3 also function as updown counter pins. 2. p6.1 and p6.2 are not assigned pins.
4/13 msm6545/6575/6545l/6575l ? semiconductor pin descriptions symbol type description port0 (p0.0 to p0.3) i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor 4-bit input port tie to the negative pole of the battery when not used. bd o buzzer output pin reset i reset pin with input pull-down resistor test1 testing pins with input pull-down resistor tie to the negative pole of the battery. test2 i test3 xt i connection pins for crystal oscillator xtb o v dd 0 v power supply pin v ss1 C1.5 v supply pin (power supply pin for C1.5 v operation) v ss2 C3.0 v supply pin (power supply pin for C3.0 v operation) v cp connection pins for internal potential development capacitor v cm port1 (p1.1 to p1.3) port2 (p2.0 to p2.3) port3 (p3.0 to p3.3) port4 (p4.0 to p4.3) port5 (p5.0 to p5.3) port6 (p6.0 to p6.3) p2.0 to p2.3 external interrupt port p6.3: sclk shared with serial port i port7 (p7.0 to p7.3) p7.0: sout p7.1: sin p7.2: bu/d shared with 4-bit up/down counter p7.3: cclk v ee supply pin for internal logic (constant voltage circuit output pin)
5/13 msm6545/6575/6545l/6575l ? semiconductor absolute maximum ratings (msm6545/6575, 1.5 v, buf = "0") parameter symbol condition rating unit power supply voltage v ss1 ta = 25c C6.0 to +0.3 input voltage v in v ss1 C 0.3 to +0.3 v output voltage v out v ss1 C 0.3 to +0.3 storage temperature t stg C55 to +125 c v dd = 0 v (v ss1 = battery voltage) note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss2 ). recommended operating conditions (msm6545/6575, 1.5 v, buf = "0") parameter symbol condition range unit operating voltage v op C1.75 to C0.9 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss1 = battery voltage) note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss2 ). electrical characteristics (msm6545/6575, 1.5 v, buf = "0") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 3 m a oscillation start voltage Cv osc within 2 seconds v ss1 0.9 v output current 1 Ci oh1 v o = C0.5 v 150 port0 to port6*2 sout, sclk m a i ol1 v o = C1.0 v 150 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C1.0 v 20 input current 1 i ih1 v i = 0 v, in the input state, with pull-down resistor 7 port0 to port6 *2 15 30 m a input leakage current ? i il ? v i = 0 v, C1.5 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, with pull-down resistor 70 reset test1 to test3 250 500 m a input voltage Cv ih all input pins 0.3 v Cv il 1.2 v dd = 0 v, v ss1 = C1.5 v (battery voltage), v ss2 = C3.0 v, f osc = 32.768 khz, c x = 35 pf, ta = 25c *1 depends on the program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss2 ).
6/13 msm6545/6575/6545l/6575l ? semiconductor absolute maximum ratings (msm6545/6575, 1.5 v, buf = "1") electrical characteristics (msm6545/6575, 1.5 v, buf = "1") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 1.5 m a oscillation start voltage Cv osc within 2 seconds v ss1 0.9 v output current 1 Ci oh1 v o = C0.5 v 150 port0 to port6*2 sout, sclk m a i ol1 v o = C1.0 v 150 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C1.0 v 20 input current 1 i ih1 v i = 0 v, in the input state, with pull-down resistor 7 port0 to port6 *2 15 30 m a input leakage current ? i il ? v i = 0 v, C1.5 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, without pull-down resistor 70 reset test1 to test3 250 500 m a input voltage Cv ih all input pins 0.3 v Cv il 1.2 v dd = 0 v, v ss1 = C1.5 v (battery voltage), v ss2 = C3.0 v, f osc = 32.768 khz, c x = 35 pf, ta = 25c *1 depends on the program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 recommended operating conditions (msm6545/6575, 1.5 v, buf = "1") parameter symbol condition range unit operating voltage v op C1.75 to C0.9 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss1 = battery voltage) note: the input of the constant voltage circuit is directly connected to the power supply (v ss1 ). parameter symbol condition rating unit power supply voltage v ss1 ta = 25c C6.0 to +0.3 input voltage v in v ss1 C 0.3 to +0.3 v output voltage v out v ss1 C 0.3 to +0.3 storage temperature t stg C55 to +125 c v dd = 0 v (v ss1 = battery voltage) note: the input of the constant voltage circuit is directly connected to the power supply (v ss1 ). note: the input of the constant voltage circuit is directly connected to the power supply (v ss1 ).
7/13 msm6545/6575/6545l/6575l ? semiconductor absolute maximum ratings (msm6545l/6575l, 3.0 v, buf = "0") parameter symbol condition rating unit power supply voltage v ss2 ta = 25c C6.0 to +0.3 input voltage v in v ss2 C 0.3 to +0.3 v output voltage v out v ss2 C 0.3 to +0.3 storage temperature t stg C55 to +125 c v dd = 0 v (v ss2 = battery voltage) recommended operating conditions (msm6545l/6575l, 3.0 v, buf = "0") parameter symbol condition range unit operating voltage v op C3.5 to C1.8 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss2 = battery voltage) electrical characteristics (msm6545l/6575l, 3.0 v, buf = "0") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 0.75 m a oscillation start voltage Cv osc within 2 seconds v ss2 1.8 v output current 1 Ci oh1 v o = C0.5 v 500 port0 to port6*2 sout, sclk m a i ol1 v o = C2.5 v 500 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C2.5 v 20 input current 1 i ih1 v i = 0 v, in the input state, with pull-down resistor 50 port0 to port6 *2 100 200 m a input leakage current ? i il ? v i = 0 v, C3 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, with pull-down resistor 200 reset test1 to test3 750 1500 m a input voltage Cv ih all input pins 0.5 v Cv il 2.5 v dd = 0 v, v ss1 = C1.5 v, v ss2 = C3.0 v (battery voltage), f osc = 32.768 khz, c x = 35 pf, ta = 25c note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss1 ). *1 depends on the program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss1 ). note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss1 ).
8/13 msm6545/6575/6545l/6575l ? semiconductor absolute maximum ratings (msm6545l/6575l, 3.0 v, buf = "1") parameter symbol condition rating unit power supply voltage v ss2 ta = 25c C6.0 to +0.3 input voltage v in v ss2 C 0.3 to +0.3 v output voltage v out v ss2 C 0.3 to +0.3 storage temperature t stg C55 to +125 c v dd = 0 v (v ss2 = battery voltage) note: the input of the constant voltage circuit is directly connected to the power supply (v ss2 ). recommended operating conditions (msm6545l/6575l, 3.0 v, buf = "1") parameter symbol condition range unit operating voltage v op C3.5 to C0.9 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss2 = battery voltage) note: the input of the constant voltage circuit is directly connected to the power supply (v ss2 ). electrical characteristics (msm6545l/6575l, 3.0 v, buf = "1") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 1.5 m a oscillation start voltage Cv osc within 2 seconds v ss2 0.9 v output current 1 Ci oh1 v o = C0.5 v 500 port0 to port6*2 sout, sclk m a i ol1 v o = C2.5 v 500 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C2.5 v 20 input current 1 v i = 0 v, in the input state, with pull-down resistor 50 port0 to port6 *2 100 200 m a input leakage current ? i il ? v i = 0 v, C3 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, with pull-down resistor 200 reset test1 to test3 750 1500 m a input voltage Cv ih all input pins 0.5 v Cv il 2.5 v dd = 0 v, v ss1 = C1.5 v, v ss2 = C3.0 v (battery voltage), f osc = 32.768 khz, c x = 35 pf, ta = 25c i ih1 *1 depends on the program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 note: the input of the constant voltage circuit is directly connected to the power supply (v ss2 ).
9/13 msm6545/6575/6545l/6575l ? semiconductor notes on use power supply for 0.9 v microcontroller series (backup flag and constant-voltage circuit) the 0.9 v devices have a built-in constant-voltage circuit. the output of this constant-voltage circuit powers the microcontroller's internal logic circuits. setting a backup flag (buf) allows the input of the constant voltage circuit to be switched to either the battery or the output generated in the voltage converter, based on the battery voltage. a battery voltage of 1.5 v or 3.0 v can be selected. the output (v ee ) of the constant-voltage circuit is set at approximately C1.3 v. this allows the current consumed by the internal logic to be limited, irrespective of the battery voltage. however, if the input of the constant voltage circuit is below this set value (approximately C 1.3v), the output (v ee ) is equal to the input. the 0.9 v microcontroller can be operated even if the internal voltage (output from the constant voltage circuit) falls to 0.9 v. setting the backup flag allows a larger operating voltage margin despite changes in internal voltage due to noise. for example, for the 1.5 v specification, setting the backup flag at "0" supplies twice the battery voltage to the constant voltage circuit. thus, even if the battery voltage falls to 0.9 v, the output voltage (v ee ) is maintained at C1.3 v, providing a larger margin of operating voltage of the internal logic circuits, because 1.8 v is applied to the input of the constant-voltage circuit. figures 1 to 4 show the internal status depending on the backup flag settings for the battery, as well as status features. xtal v dd (0 v) v ss1 (C1.5 v) v ss2 (C3.0 v) v ss3 * (C4.5 v) v ee (aboutC1.3 v) lcd driver* voltage converter backup flag (buf) constant voltage circuit vr internal logic xt xtb * the v ss3 pin is provided for the devices that contain an lcd driver.
10/13 msm6545/6575/6545l/6575l ? semiconductor (figure 1) 1.5 v operation (backup flag = 1) voltage converter vr internal logic v dd = 0 v v b = C1.5 v (C3.0 v) v ee v dd v ss1 v ss2 voltage doubler internal status operating range current consumption feature the battery level v ss1 is applied to the input of the constant voltage circuit. C0.9 to C1.75 v 1.5 m a* when the battery level is powered down, the internal circuit is powered directly by the battery. * when the software dut y is about 5% (figure 2) 1.5 v operation (backup flag = 0) feature internal status internal logic voltage doubler voltage converter vr v dd = 0 v v b = C1.5 v (C3.0 v) v ee v dd v ss1 v ss2 operating range current consumption a doubled level of v ss2 is applied to the input of the constant voltage circuit. C0.9 to C1.75 v 3 m a* when the battery level is powered down, a larger operating voltage margin is gained, compared to the case of figure 1. * when the software dut y is about 5% (figure 3) 3.0 v operation (backup flag = 1) voltage doubler voltage converter vr v dd = 0 v v b = C3.0 v (C1.5 v) v ee v dd v ss1 v ss2 feature internal status operating range current consumption the battery level v ss2 is applied to the input of the constant voltage circuit. C0.9 to C3.5 v 1.5 m a* when the battery level is powered down, the internal circuit is powered directly by the battery. internal logic * when the software dut y is about 5%
11/13 msm6545/6575/6545l/6575l ? semiconductor (figure 4) 3.0 v operation (backup flag = 0) voltage doubler voltage converter vr v dd = 0 v v b = C3.0 v (C1.5 v) v ee v dd v ss1 v ss2 feature internal status operating range current consumption a doubled level of v ss1 is applied to the input of the constant voltage circuit. C1.8 to C3.5 v when the battery level is powered down, a smaller operating voltage margin is gained, compared to the case of figure 3. internal logic 0.75 m a* * when the software dut y is about 5%
12/13 msm6545/6575/6545l/6575l ? semiconductor (unit : mm) package dimensions notes for mounting the surface mount type package the sop, qfp, tsop, soj, qfj (plcc), shp and bga are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact okis responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). qfp44-p-910-0.80-k package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 0.35 typ. mirror finish
13/13 msm6545/6575/6545l/6575l ? semiconductor (unit : mm) notes for mounting the surface mount type package the sop, qfp, tsop, soj, qfj (plcc), shp and bga are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact okis responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 0.41 typ. qfp44-p-910-0.80-2k mirror finish

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