Casio CASSIOPEIA A-20 Service Manual & Parts List page 32

N o . Pin Name V o l t
121 KBOUT7 3V
122 KBOUT6 3V
123 KBOUT5 3V
124 KBOUT4 3V
125 KBOUT3 3V
126 KBOUT2 3V
127 KBOUT1 3V
128 KBOUT0 3V
129 KBDIN0 3V
130 KBDIN1 3V
131 KBDIN2 3V
132 KBDIN3 3V
133 KBDIN4 3V
134 KBDIN5 3V
135 KBDIN6 3V
136 VSS
137 KBDIN7 3V
138 XCKIN Analog
139 XCKOUT Analog
140 VDD2 3V
141 ONSWB 3V
142 PENPUTB 3V
143 LEDOFFB 3V
144 DOCKB 3V
145 CHGDTCT 3V
146 ACLB 3V
147 BCVRB 3V
148 BATDTCT 3V
149 ACDTCTB 3V
150 VDETS 3V
151 VDTC5B 3V
152 VDTC3B 3V
153 VDET3B 3V
154 VDET2R 3V
155 VDET2 3V
156 VDET1RB 3V
157 VDET1B 3V
158 PSEL5 3V
159 PLCD 3V
160 PEL 3V
161 PDMMYS 3V
162 PDMMYM 3V
163 PCRD2 3V
164 PCRD 3V
165 P5DCHG 3V
166 P5V 3V
167 P25ON 3V
168 EVOLDAT 3V
169 EVOLDIR 3V
170 EVOLCS 3V
171 EVOLCLK 3V
172 CAS1HUB 3V
173 CAS1HLB 3V
174 CAS1LUB 3V
175 CAS1LLB 3V
176 CAS0HUB 3V
177 CAS0HLB 3V
178 CAS0LUB 3V
179 VSS
180 VDD2 3V
181 CAS0LLB 3V
I o / O u t
O Key common signal
O Key common signal
O Key common signal
O Key common signal
O Key common signal
O Key common signal
O Key common signal
O Key common signal
I Key input signal
I Key input signal
I Key input signal
I Key input signal
I Key input signal
I Key input signal
I Key input signal
GND
I Key input signal
I Oscillator input(3.68MHz)
I/O Oscillator output(3.68MHz)
+3V source
I ON switch signal
I Pen down status signal
I LED cancel signal
I Cradle detector
I
I ACL signal at battery loaded.
I Battery cover detecting port
I Alkaline/NiMH detecting port
I AC adaptor detect port
I Backup battery detecting signal
I Alkaline battery detecting signal
I Alkaline battery detecting signal
I Alkaline battery detecting signal
I NiMH detecting signal(Off)
I Alkaline battery detecting signal(Off)
I NiMH detecting signal(Low Battery)
I Alkaline battery detecting signal(Low Battery)
O Power supply select signal for PCMCIA (3/5V)
O LCD Voltage control signal
O EL Voltage control signal
O For backup battery detector
O V3 system control signal
O VGA288 Voltage control signal
O PCMCIA Voltage control signal
O V5 Voltage control signal
O V5 Voltage control signal
O LCD(+25V) Voltage control signal
O Electronic volume (DAT)
O Electronic volume (DIR)
O Electronic volume (CS)
O Electronic volume (CLK)
O CAS signal for DRAM
O CAS signal for DRAM
O CAS signal for DRAM
O CAS signal for DRAM
O CAS signal for DRAM
O CAS signal for DRAM
O CAS signal for DRAM
GND
+3V source
O CAS signal for DRAM
— 29 —
Function To/From
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
Keyboard
X1
X1
Keyboard
Touch panel
LCD unit (SW)
RS232C
Power supply
IC113(Power supply)
SW100
SW101
Q105 (Power supply)
Q119 (Power supply)
IC109 (Power supply)
IC110 (Power supply)
IC107 (Power supply)
Q100 (Power supply)
Q103 (Power supply)
IC101 (Power supply)
IC100 (Power supply)
Q113 (Power supply)
Q201 (I/F Block)
Q116 (Power supply)
IC115 (Power supply)
Q112 (Power supply)
Q118 (Power supply)
Q117 (Power supply)
Q115 (Power supply)
Q107,Q111 (Power supply)
IC201
IC202 (EVOL)
IC202 (EVOL)
IC202 (EVOL)
IC202 (EVOL)
DRAM
DRAM
DRAM
DRAM
DRAM
DRAM
DRAM
DRAM