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data sheet as2574b rev. 1 1 jan. 1995 package available in 28 pin dip and plcc. 20 number one touch dialler with serial bus for display driver austria mikro systeme international key features q low operating voltage (2.5v to 5.5v) q low current consumption (typ. 200 m a in ld mode) q oscillator using ceramic resonator (681 khz) q mf level independent of supply voltage q direct wake-up from keyboard q automatic call progress by direct memory key q data protection with 8 digit fifo q sliding cursor protocol with comparison q diode options for different ptt requirements q automatic pause generation after access code q temporary mf select via keyboard q 36 digit lnr (last number redial) q 20 memories addressable with direct keys and the 2nd key or indirect with a mem key q notepad q serial interface to display driver as2590 q consistent, simple and useable procedures q input for dial tone recognizer general description the as2574b is an integrated cmos device for feature telephones. it is a very versatile ld/mf dialler with serial interface to a display driver. the device is designed to be used in a wide variety of applications together with the companion display driver, as2590. the on chip ram can contain up to 20 memories (each with maximum 18 digits), a 36 digit last number redial (lnr) and an 18 digit notepad. access to the 20 memo- ries is either with direct keys, abbreviated dial code or a combination of both. the as2574b provides a unique feature, automatic call progress (acp), on all memory keys, i.e. the circuit automatically seizes the line and waits for the dial tone and dials the number just by pressing any of the memory keys (including lnr). the circuit features 2 different access code procedures to allow easy use under a pabx. a dial tone input enables the use of a dial tone recognizer. sda scl r5 c6 c5 c4 c3 c2 c1 v dd hs tone dp r1 r2 r3 r4 er vss tb as2574b dialler/controller la lb e ls cd mr mt m4 m8 m7 m6 m5 m2 m1 m3 mask osc1 osc2 681khz mute r enter 2nd # 6 3 9 0 5 2 8 * 4 1 7 m10 mem m9 lnr ls sda scl v dd x1 x2 v23 v13 v lcd bias ms vss as2590 32.768khz display mode acp m/b ms flash ground loop speech loudhearing handsfree tone ringer application high feature telephone sets. direct wake-up is an ams patented solution providing line seizing with a telephone, that is entirely powered from the telephone line, by pressing a key in a key matrix connected to a dialler/controller that is constantly connected to the line by means of a line voltage limiter and yet maintaining a high dc isolation resistance in idle state (on-hook). the wake-up feature allows the user to go off-hook by pressing a direct memory key or a loudspeaker key, so-called on- hook dialling or call progress monitoring, and thereby seize the line.
data sheet as2574b rev. 1 2 jan. 1995 pin # pin node description 1 osc2 oscillator pins for ceramic resonator (681 khz) 2 osc1 3 scl the scl output is used to clock all data into the display driver 4 sda the sda output is used to transfer data into the display driver 5 - 10 c1 - 6 keyboard columns 11 - 15 r1 - 5 keyboard rows 16 ls output for controlling loudhearing and handsfree facilities, active high (see hook state diagramme) 17 mask mask output, active high during pulsing (make and break period, see timing diagrammes). 18 cd chip disable input, active low. when cd is low, the circiut is disabled. if this pin is pulled to v ss during off-hook (indicating a disconnect) for more than 2 sec., the circuit is reset*. if the pin is pulled to v ss for less than 2 sec., the line break is ignored. * if in acp or monitor state, reset also means return to idle state. 19 mr mute output, active high during signalling (see timing diagrammes). 20 mt transmit mute output, active high when mr is high and when the mute key has been activated (see timing diagrammes). 21 er earth recall input/output, active high during er but when forced to v dd , the flash is enabled. 22 dt dial tone input. this input is scanned when invoking acp or a pause is read in a digit string: dt pin function open pause duration 4.1 sec low if a high is not detected within 8 sec., the circuit is reset * high if the pin is high for > 1.15 sec., the pause is termi- nated and the dialling continued. noise immunity > 8 ms * reset means that dialling is stopped and the circuit returns to standby. if the circuit was in acp state, the reset will also return the circuit to idle state. 23 dp hook switch control, dial pulse and flash output; low during idle and break periods and high during off-hook (see timing diagrammes). pin description continues
data sheet as2574b rev. 1 3 jan. 1995 pin description continued pin # pin node description 24 hs hook switch input; active high with internal pull-down resistor. debounce 25 ms. 25 vss negative terminal of power supply. 26 tb tone burst output: ls high 80 ms burst, 8 sec pause mt high 80 ms burst, 2 sec pause only in speech mode mt+ls high 80 ms burst, 2 sec pause 27 tone mf tone output. an on chip reference voltage provides tone levels independent of the supply voltage. a dc path from tone output is needed to accommodate an external voltage divider for setting the appropriate tone level. frequencies: frequency (hz) key matrix (hz) error (%) 697 row 1 770 row 2 852 row 3 941 row 4 1209 col. 1 0.7% 1336 col. 2 1477 col. 3 1633 see p. 7 28 vdd positive terminal of power supply recall 123 45 6 78 9 0 * # ls lnr m9 m1 m2 m3 m4 2nd mute m5 m6 m7 m8 column 123456 rows 1 2 3 4 5 the keyboard is arranged in a 5 x 6 contact matrix with single pole single throw contacts (spst). keyboard resistance: ron < 5 k w ; roff > 5 m w . enter mem m10 enabled only when off-hook enabled also when acp is active (diode 5 inserted) enabled when cd = high in off-hook state all keys are enabled (cd = high) keyboard layout
data sheet as2574b rev. 1 4 jan. 1995 power on reset the on chip analogue power on reset circuit monitors the supply voltage (v dd ). as long as v dd remains below the internal reference voltage, v ref (typically 1.2v), the oscillator is inhibited. when v dd rises above v ref , a reset signal is generated to assure correct start-up, and the oscillator is enabled. the correct start-up/reset condition of the circuit is guaranteed regardless of the absolute and chronologi- cal rise time of v dd , cd and hs inputs. line supervision in off-hook condition the device performs supervision of the line current disconnects in the following manner: line disconnects (cd low) of less than 2 sec. are ignored and the device continues operation. line disconnects of more than 2 sec. cause stop of dialling and the circuit is switched to standby mode if hs is high, otherwise the circuit will return to idle mode. mode selection the default mode (ld or mf) can be selected by the diode option mode (diode 6). when default ld mode is selected, a temporary change to mf mode can be invoked by pressing the * key. when the circuit is in temporary mf mode, each of the mute key depressing the mute key activates and deactivates (toggle switch) the mt output, when internal mute is inactive, i.e. when no data is being read from the ram or fifo. a change of the hook state will release the mute. valid keys a valid key is detected from the keyboard by connecting the appropriate row to the column. this can be done using an n x m keyboard matrix with single contacts. positive and negative edges of each contact are de- bounced. the debounce time is 15 ms. in idle state (on-hook) only the ls key is always valid independent of the cd pin. when diode 5 is connected, also the lnr , mem , and m1 - 9 keys are valid entries invoking acp (automatic call progress). following procedures revert it to default ld mode: - pressing r key (all subsequently entered digits are buffered in fifo), - by next on-hook. last number redial lnr is a facility that allows resignalling of the last manually dialled number without keying in all the digits again. the lnr is repeatable. a manually entered number is automatically stored in the lnr ram. the capacity of the ram is 36 digits. if a number greater than 36 digits is entered, the lnr facility will be inhibited (until new entries < 37 digits) and further entries will be buffered in fifo. if more than 18 digits are entered, the display will show the digit 19 and onwards. postdialled digits, i.e. digits manually entered after lnr has been invoked, are not stored in ram but buffered in fifo. the current contents of the lnr ram are overwritten by new entries. memory dial an on chip ram enables the dialler to store up to 20 numbers, each containing a maximum 18 digits/data. the first 10 memories are accessible with 10 direct dial keys ( m1 to m10 ) and another 10 memories (11 - 20) are accessible by pressing the 2nd key before one of the direct dial keys or by pressing the mem key and a digit 0 - 9 (abbreviated dialling). basic store procedure: 1 press enter key 2 key in digits, including access code, pauses and recall as appropriate (number is stored in lnr ram) 3 select location by keeping enter key depressed while entering the desired location ( m1 m10 , 2nd m1 m10 , or mem 0 9 ) 4 release enter key to finish 5 continue with 1, 2, 3 and 4 for storing further numbers. only the first 18 digits/data will be stored when copying more than 18 digits/data in a memory.
data sheet as2574b rev. 1 5 jan. 1995 recall function a recall activation will invoke a flash (timed loop break) or an earth recall (er) depending on the er pin. when the er pin is forced to v dd , a flash is executed; and when er is open (> 50 k w }, an earth recall is executed. if r is the first entry in a digit string, it will be stored in lnr ram. if the r key is depressed after a digit string has been dialled out, the recall will not be stored, and subsequently entered digits will be buffered in the fifo. a recall will automatically generate a pause when a recall is read from a memory and therecall has been stored as an access code. a manual invoked earth recall will pull er high for minimum 500 ms, but the er pin is maintained high as long as the key is depressed. during auto dial an earth recall is executed with a duration of 500 ms. pause generation pause introduces a delay in signalling digits strings to accommodate second and subsequent dial tones. automatic pauses are generated: - during dialling out from memories when the first digit(s) in the digit string equal the stored access code(s) (pause depends on dt input). - when going off-hook by pressing lnr , mem , or m1 - 9 (acp). any pause can be terminated (shortened) prior to time out by pressing the lnr key or a high level on the dt input. during acp a pause time out, i.e. dt kept low for > 8 sec., will return the device to idle state. pauses are storable as digits within a string of any of the memories by pressing 2nd # during programming. multiple pause entries can be stored up to the maximum length of the digit string (18 digits/data). a pause is not accepted in location 1 of a digit string. if more pauses have been stored in succession, they can all be terminated by one depression of the lnr key or a high level on the dt pin for 3 1.15 sec. sliding cursor procedure to accommodate redialling (lnr) behind a pabx wi- thout using automatic pause generation (storing access codes), a sliding cursor protocol is implemented. if new entries match the previous lnr ram contents, pressing the lnr key will dial out the remaining digits. if there is an error in matching, the lnr will be inhibited until next on-hook, and the lnr ram will contain the new number. access codes different access codes (totally up to 18 digit/data inclu- ding spaces) can be stored in one string. spaces bet- ween the different access codes are entered by pressing the 2nd # during programming. each access code can contain up to 4 digits. if one or more access codes are stored, the first entered digit(s) in a digit string read from the ram will be compared with the access code(s) and if equal, a pause is generated. example on programming access codes: enter, 9 , 2nd #, 50 keep enter depressed while pressing 0 release both the first access code in this example is 9 and the second 50.
data sheet as2574b rev. 1 6 jan. 1995 no symbol/command msb b3 b2 b1 lsb hex 10111001c 2 1 0000000 3 2 0010004 4 3 0001002 5 4 1000010 6 5 1010014 7 6 1001012 8 7 0100008 98011000c 10 9 0 1 0 1 0 0a 11 a 0 0 1 1 0 06 12 b 1 0 1 1 0 16 13 c 0 1 1 1 0 0e 14 d 1 1 1 1 0 1e 15 * 1 1 0 0 0 18 16 # 1 1 0 1 0 1a 17 pause 1 1 0 1 1 1b 18 temporary mf select 1 1 0 0 1 19 19 recall 0 0 0 0 1 01 20 ls on 0 0 1 0 1 05 21 ls off 0 0 0 1 1 03 22 mt on 1 0 0 0 1 11 23 mt off 0 1 0 0 1 09 24 2nd on 0 0 1 1 1 07 25 2nd off 1 1 1 1 1 1f 26 set clock 0 1 0 1 1 0b 27 start 0 1 1 0 1 0d 28 start copy 0 1 1 1 1 0f 29 start fifo 1 0 0 1 1 13 30 start timer 1 0 1 0 1 15 31 blank all 1 1 1 0 1 1d 32 test mode 1 0 1 1 1 17 serial interface the as2574b supports a serial bus. the protocol defines device that sends data onto the bus as a transmitter, and the receiving device as the receiver. the as2574b is controlling the transfer and hence the master. the display driver, as2590, being controlled is the slave. clock and data conventions data states on the sda line can change only during scl low. sda state changes during scl high are reserved for indicating start and stop conditions (see figure 1). start condition all commands are preceded by the start condition, which is a high to low transition of sda when scl is high. stop condition all communications are terminated by a stop condition, which is low to high transition of sda when scl is high. start bit sda scl bit 0 bit 1 bit 4 stop bit word gap figure 1: data transmission
data sheet as2574b rev. 1 7 jan. 1995 key/key combination function remarks enter programming r flash or ground loop code no 19 mem abbreviated dialling mute privacy mute code no 22/23 ls monitor/handsfree code no 20/21 lnr last number redial during execution of a pause the lnr key is used to terminate the pause. m1 - 10 direct memory keys 2nd second functions code no 24 2nd, 1 a code no 11 2nd, 2 b code no 12 2nd, 3 c code no 13 2nd, 4 d code no 14 2nd, * enter fifo code no 29 2nd, # pause code no 17 2nd, m1 - 10 memories 11 - 20 mem, 0 - 9 memories 11 - 20 enter, address* displaying content of memo enter/address* programming code no 28 when both keys are released enter/# setting clock code no 26 2nd, 5 - 9 5 - 9 code no 6 - 10 2nd, 0 0 code no 1 2nd, r recall code no 19 2nd, mute privacy mute code no 22/23 enter/lnr clearing lnr code no 27 enter, enter displaying access code code no 27 *) address means m1 - 10 keys or 2nd , m1 - 10 or mem , 0 - 9 key combinations. key combinations
data sheet as2574b rev. 1 8 jan. 1995 diode options system considerations the device is intended to be used in telephone instru- ments, that are permanently on-line, i.e. also when on- hook the circuit is connected to the telephone line, but in standby mode (idle) and hence only drawing a small leakage current from the line. this implementation offers new features like electronic hook switch and call progress monitoring (on-hook dialling). call progress monitoring (cpm) means pressing the ls key will switch the telephone on from standby (direct wake-upfrom keyboard) and will present the dialling tones via a loudspeaker without lifting the handset. furthermore, it is also possible to invoke the cpm by pressing the lnr , mem or m1 - 9 when the acp (automatic call progress) is activated (diode 5). option column function no diode diode nop 1 number of pulses standard nz digit 1 1 9 228 337 446 555 664 773 882 991 01010 ft 2 flash time 101.2 ms 600 ms ms 3 memory size 10 20 m/b 4 make/break ratio 33/66 ms 40/60 ms acp 5 automatic call progress no yes mode 6 default signalling mode mf ld procedure principles the procedures for utilizing the features of the device are optimized out of consideration for the human factor in order to: - meet the users expectations - be easy to learn and relearn - not invoke any automatic functions which the user doesn? expect - protect the user from committing critical errors, e.g. dialling wrong numbers, deleting stored numbers, etc. - be consistent, simple and usable. 123456 columns row 5 mode acp m/b ms ft nop the diode options are scanned by por and low to high transition on hs.
data sheet as2574b rev. 1 9 jan. 1995 manual dial symbols idle idle standby state, no keys activated lifting handset (hs = high) or pressing ls key replacing handset (hs = low) or repressing ls key off-hook on-hook idle idle speech mode idle entries are dialled out the last manually dialled number is automatically stored in the lnr ram. in ld mode * invokes temporary mf mode and # are ignored. in mf mode * and # are automatically stored in lnr ram. off-hook key in digits entries stored in lnr ram on-hook
data sheet as2574b rev. 1 10 jan. 1995 programming/notepad speech mode or idle speech mode or idle speech mode during programming the dial out is inhibited. 10 direct dial keys, a mem and a 2nd key are available for addressing up to 20 numbers. each number can contain up to 18 digits, including recall and pauses. programming a new number will automatically clear the previous. 2nd , # has to be pressed between the different access codes. no change digits are entered in lnr ram the content of the lnr ram is stored in the selected memory. speech mode enter key in number keep enter depressed enter direct dial (m1 - 10) 2nd mem digit 0 (access codes) digit 0-9 (m11 - 20) direct dial (m11 - 20) access code(s) are displayed release enter code no 28 stored key in an address content of selected memory is displayed enter correction
data sheet as2574b rev. 1 11 jan. 1995 direct dial/abbreviated dial/last number redial idle n y y n y n d d d d d d off-hook diode 3 ? digit 0 - 9 (m11 - 20) direct dial (m11 - 20) mem 2nd direct dial (m1 - 10) lnr dialling pause all digits dialled ? dt pin executing pause starting timer speech mode postdialling available d hs = high y n dt high 3 1.15 sec hi-z pause 4 sec h l terminate pause reset timer timer overflow y n y n
data sheet as2574b rev. 1 12 jan. 1995 automatic call progress (acp) off-hook start timer off-hook start timer off-hook start timer speech mode d d y d d n y off-hook start timer d y n y n idle diode 3 ? (diode 5 inserted) mem direct dial (m1 - 9) lnr digit 0 - 9 (m11 - 20) time-out 8 sec reset timer dialling pause all digits dialled ? postdialling available dt pin executing pause starting timer dt high 3 1.15 sec hi-z pause 4 sec h l terminate pause reset timer timer overflow y n y n off-hook start timer off-hook start timer n time-out 8 sec n y
data sheet as2574b rev. 1 13 jan. 1995 privacy mute speech mode speech mode mt output will go low. speech mode mt high dialling mt output will go low. (code 23) (code 22) (code 23) mute key change of hook state mute key
data sheet as2574b rev. 1 14 jan. 1995 temporary mf select speech mode ld default speech mode mf selected ld default idle all further entries are not stored in lnr ram but buffered in fifo. the lnr ram will contain the number entered before pressing the * key and the mode change code. * key in digits recall on-hook key in digits off-hook ld default speech mode ld default
data sheet as2574b rev. 1 15 jan. 1995 setting clock (in display driver) speech mode or idle keep enter depressed speech mode or idle speech mode keep enter depressed speech mode or idle __:__ 18:__ 18:31 press # release enter key in hours (2 digits) key in min. (2 digits) keep enter depressed enter keep enter depressed enter
data sheet as2574b rev. 1 16 jan. 1995 hook states ls m ls ls idle p o t p o t + monitor on-hook off-hook 1) 2) 1) pressing any unvalid key doesnt have any effect in idle state. 2) pot means plain ordinary telephone. 3) lift handset means hs going high. 4) replace handset means hs going low. 5) lifting the handset during acp will change the hook state to pot, however, the dialling will continue uneffected. automatic call progress (acp) ls dialling finished n y n y ( ) diode 5 ? 5) monitor or handsfree
data sheet as2574b rev. 1 17 jan. 1995 timing diagrammes the timing diagrammes do not show the correct scaling only the sequence. cd hs < 2 sec. 2 sec. dp p.o.t. whole keyboard enabled diode scanning cd ls key dp < 2 sec. 2 sec. monitor state whole keyboard enabled ii ii ii cd ls key dp < 2 sec. 2 sec. ii ii ii
data sheet as2574b rev. 1 18 jan. 1995 ld dialling mf dialling mr tpo tb tb osc mask dp tidp tm tb tpo tidp 2 1 key entry mt = depending on mute key (high when mute key has been activated, otherwise low) tpre tpre tho dp 3 key entry 2 1 mt mask tone osc ttd titp mr = depending mute key (high when mute key has been activated, otherwise low) tmo tho tmo tho
data sheet as2574b rev. 1 19 jan. 1995 flash ground loop (gl) pause r osc key entry mr mask dp gl tpo mt = depending on mute key (high when mute key has been activated, otherwise low) tfd t ho t pre tpo r tgl gl dp mask mr mt key entry osc pause = depending on mute key (high when mute key has been activated, otherwise low) tho t pre
data sheet as2574b rev. 1 20 jan. 1995 tone mt mr osc mask dp key entry = depending on mute key (high when mute key has been activated, otherwise low) lnr gl pause tap automatic dialling mf (content of lnr is flash, 1, 2, 3, and flash is stored as access code) tmo tpo mt mr osc mask dp key entry = depending on mute key (high when mute key has been activated, otherwise low) lnr gl pause tap automatic dialling ld (content of lnr is gl, 2, 1 and gl is stored as access code) tidp tpo tho
data sheet as2574b rev. 1 21 jan. 1995 parameter symbol min typ max unit condition supply current i dd outputs unloaded operating except mf 200 250 m a operating mf 0.75 1 ma data retention 1 2 m av dd =1.8v; note1 24 m a note 1 input voltage low vil v ss 0.3xv dd v high vih 0.7xv dd v dd v input current low iil 1 m a high iih 1 m a output current sink iol 1.5 ma vol = 0.4v source ioh 1 ma voh = v dd - 0.4v pull-down resistor hs input rhs 1 m w cd input rcd 1 m w scanning current dt during pause sink isl 20 150 m a source ish 20 150 m a parameter symbol min typ max unit condition operating temperatur top - 25 70 c operating voltage v dd 2.5 3.0 5.5 v retention voltage v dd 1.8 5.5 v oscillator frequency fosc 681 khz electrical data absolute maximum ratings recommended operating range dc characteristics default conditions: recommended operating range; v dd = 3.0v. note 1: circuit in idle state (hs = low and no key activated). positive supply voltage ........................................................................................................ ...........-0.3v v ls 7v input voltage .................................................................................................................. .....-0.3v v in v dd + 0.3v input current .................................................................................................................. .............................. 25 ma storage temperature ............................................................................................................ ..........-65 c to +125 c electrostatic discharge (hbm) .................................................................................................. .................... 1000v
data sheet as2574b rev. 1 22 jan. 1995 parameter symbol min typ max unit condition clock startup time ts 5 ms key debounce time td 14 18 ms hs debounce time ths 21 26 ms cd reset delay time tr 2 sec dtmf tone level, high group vol - 12.4 - 10.9 - 9.4 dbm rl = 15 k w preemphasis 2 2.5 2.8 dbm rl = 15 k w distortion - 26 dbr rl = 15 k w , note 3 tone duration ttd 80 82.3 85 ms note 1 inter tone pause titp 80 82.3 85 ms note 1 tone rise/fall time ttr 5 ms note 2 ld dial rate 10 pps 5% make/break period tm/tb 33/66 ms 5% (diode option) 40/60 ms 5% inter digit pause tidp 753 785 ms pre digit pause tpre 55 57 ms post digit pause tpo 55 57 ms flash duration tfd 100 101.2 103 ms no diode 2 600 620 ms with diode 2 earth recall tg duration 500 510 ms automatic access pause tap short 4 4.1 4.2 sec dt = hi-z long 7.9 8 8.1 sec dt = low termination 1.15 1.2 1.25 sec dt = high mute overhang tmo 182 200 223 ms mr/mt hold over tho 18 27 ms tone burst frequency fb 700 800 hz output level vtb -13 -11 -9 dbm tone duration ttb 80 85 ms inter tone pause (ls) titb1 7 8 9 sec inter tone pause (mute) titp2 1.8 2 2.2 sec time-out tto 7.7 8 8.2 sec signalling characteristics defaults conditions: recommended operating range note 1: the values are valid during automatic dialling and are minimum values during manual dialling, i.e. the tones will contin ue as long as the key is depressed. note 2: the rise time is the time from valid key detection (key has been debounced) till the tone amplitude has reached 90 % of its final value. note 3: relative to high group.
data sheet as2574b rev. 1 23 jan. 1995 pin configuration 28 pin dip 28 pin soic 28 pin plcc 128 14 15 vdd tone tb vss hs dp dt er mt r1 mr cd mask ls osc2 osc1 scl sda c1 c2 c3 c6 c4 c5 r2 r3 r4 r5 128 osc2 osc1 scl sda c1 c2 c3 c6 c4 c5 r2 r3 r4 r5 vdd tone tb vss hs dp dt er mt r1 mr cd mask 14 15 ls c1 c2 c3 c6 c4 c5 mr vss hs dp dt er mt r1 sda scl osc1 osc2 vdd tone tb r3 r4 r5 ls mask cd r2 ordering information part number package as2574b p 28 pin dil as2574b n 28 pin plcc
data sheet as2574b rev. 1 24 jan. 1995 copyright 1995, austria mikro systeme international, schloss premst?tten, 8141 unterpremst?tten, austria. trademarks registered . all rights reserved. the material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. devices sold by austria mikro systeme are covered by the warranty and patent indemnification provisions appearing in its term o f sale. austria mikro systeme makes no warranty, express, statutory, implied, or by description regarding the information set for th herein or regarding the freedom of the described devices from patent infringement. austria mikro systeme reserves the right to change specifications and prices at any time and without notice. therefore, prior to designing this product into a system, it i s necessary to check with austria mikro systeme for current information. this product is intended for use in normal commercial applications . applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such a s military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austria mikro systeme for each application.

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