Casio CASSIOPEIA A-20 User Manual

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No. Pin Name Volt Io/Out Function To/From
243 STATUS0 3V I
STATUS0 si
g
nal from CPU
IC1
244 ONSTATUSB 3V I ONSTATUS signal from CPU IC1
245 CE2B 3V I CE2B signal from CPU IC1
246 CE2A 3V I CE2A signal from CPU IC1
247 VDD2 3V +3V source
248 ONB 3V O ON circuit start signal to CPU IC1
249 RDWRB 3V I/O Read/Write signal from CPU IC1
250 RDB 3V I Read pulse signal from CPU IC1
251 CS6B 3V I Chip select-6 signal from CPU (PCMCIA) IC1
252 CS4B 3V I Chip select-4 signal from CPU (HOTARU) IC1
253 CS2B 3V I Chip select-2 signal from CPU (LCD Driver) IC1
254 CS5B 3V I Chip select-5 signal from CPU IC1
255 ICIOWRB 3V I IOWR signal from CPU IC1
256 ICIORDB 3V I IORD signal from CPU IC1
257 CASHHB 3V I CASHH signal from CPU IC1
258 CASHLB 3V I CASHL signal from CPU IC1
259 WRHB 3V I WE1 signal from CPU IC1
260 WRLB 3V I WE0 signal from CPU IC1
261 CASLHB 3V I CASLH signal from CPU IC1
262 CASLLB 3V I CASLL signal from CPU IC1
263 RASB 3V I/O RAS/CE signal from CPU IC1
264 HSTBY 3V O HSTBY signal to CPU IC1
265 WAITB 3V O WAIT signal to CPU IC1
266 CKRTC256 3V I RTC clock signal from CPU IC1
267 CFCVRB 3V I Compact Flash lock switch SW1
268 CFWEB 3V O WE signal for CompactFlash card CompactFlash card
269 CFWAITB 3V I Wait signal for CompactFlash card CompactFlash card
270 CFVS1 3V I Voltage detect for CompactFlash card CompactFlash card
271 CFRESET 3V O Reset signal for CompactFlash card CompactFlash card
272 CFREGB 3V O REG signal for CompactFlash card CompactFlash card
273 CFRDY 3V I RDY/BSY signal for CompactFlash card CompactFlash card
274 CFOEB 3V O OE signal for CompactFlash card CompactFlash card
275 CFCD2 3V I CompactFlash card detector CompactFlash card
276 CFCD1 3V I CompactFlash card detector CompactFlash card
277 VSS GND
278 CFCE2B 3V O CE2 signal for CompactFlash card CompactFlash card
279 TEST3 3V I Not used GND
280 TEST2 3V I Not used GND
281 TEST1 3V I Not used GND
282 DTYPE64 3V I Not used
283 SIFSHUTB 3V O RXD1 signal for CPU IC5 (RS232C)
284 SIFENB 3V O 9-pin RXD1 control IC5 (RS232C)
285 MDTR 3V O RS232C control signal IC5 (RS232C)
286 MDCD 3V I RS232C control signal IC5 (RS232C)
287 TXDB 3V O 3-pin TXD signal 3pin JACK
288 RXDB 3V I 3-pin RXD signal 3pin JACK

Casio CASSIOPEIA A-20 Specifications

General

Brand	Casio
Model	CASSIOPEIA A-20
Category	Handhelds
Language	English