Sharp FO-4450 Service Manual page 84

FO-4450U/FO-CS1
LC24199B-WJ0-E (IC21) Terminal description (2/2)
PIN I/O Name
105 P VSS Ground
106 I SDDCT SD DICT in
107 I DPANIC0 Address bus for NIC board
108 I DPANIC1 Address bus for NIC board
109 O DPANIC2 Address bus for NIC board
110 P DPANIC3 Address bus for NIC board
111 O DPANIC4 Address bus for NIC board
112 O DPANIC5 Address bus for NIC board
113 O DPANIC6 Address bus for NIC board
114 O DPANIC7 Address bus for NIC board
115 O DPANIC8 Address bus for NIC board
116 P DPANIC9 Address bus for NIC board
117 P DPANIC10 Address bus for NIC board
118 I DPANIC11 Address bus for NIC board
119 I DPANIC12 Address bus for NIC board
120 I VDD Power supply
121 O VSS Ground
—
122 N.C Not connect
123 P DPANIC13 Address bus for NIC board
124 P DPANIC14 Address bus for NIC board
125 P DPANIC15 Address bus for NIC board
126 O DPANIC16 Address bus for NIC board
127 O XCSNICIN Chip select of NIC in FAX mode
128 I GPIO4 PWSAVE: Power save control for PS-unit
129 I GPIO5 LEDON: Light ON/OFF for LED in CIS
130 I GPIO6 VPPCN: VPP control of nor flash memory
131 I GPIO7 XWP: Write protect for nor flash memory
132 I XNICACK Acknowledge signal for NIC
133 I XROLSNS Roller position sensor
134 I XORGSNS Document sensor
135 I XFRSNS Front sensor
136 B XB4FRS B4 width sensor
137 B PLNGON Plunger control signal
138 B VDD Power supply
139 B VSS Ground
SHCLK
140 P External bus Clock(33.3MHz)
141 P XCS Chip select signal
142 B A16 Address bus
143 B A15 Address bus
144 B A14 Address bus
145 B A13 Address bus
146 B A12 Address bus
147 B A11 Address bus
148 B A10 Address bus
149 B A9 Address bus
150 B A8 Address bus
151 B A7 Address bus
152 B A6 Address bus
153 B A5 Address bus
154 O A4 Address bus
—
155 N.C Not connect
156 P VDD Power supply
6) SM8578BV (IC22): pin-8, SOP (Real time clock IC)
It is oscillated with the quartz oscillator of 32.768 kHz, and the clock and
calendar functions are provided.
Even if the power supply of the main body is turned off, it is backed up
with lithium battery (BAT1).
This device executes the clock-synchronous type serial communication
with the Sub ASIC, and CPU can know the time and date through the
Sub ASIC.
Function PIN
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
5 – 10
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I/O Name
P VSS Ground
I A3 Address bus
I A2 Address bus
I A1 Address bus
I A0 Address bus
I XWE Write strobe signal from COSMOS
I RXW Read/Write Signal
I XRD Read strobe signal from COSMOS
B D15 Data bus
B D14 Data bus
B D13 Data bus
B D12 Data bus
B D11 Data bus
B D10 Data bus
B D9 Data bus
P VDD Power supply
P VSS Ground
Data bus
B D8
Data bus
B D7
Data bus
B D6
Data bus
B D5
B D4 Data bus
Data bus
B D3
Data bus
B D2
Data bus
B D1
B D0 Data bus
— N.C Not connect
Interrupt request signal
O INTR
Reset signal
I XRESET
I TEST Test pin
O RTCCE Chip select (RTC)
O RTCCK Serial communication clock (RTC)
B RTCDT Serial communication data (RTC)
P VDD Power supply
P VSS Ground
O Reset signal for modem chip 1
XMDMRST1
Reset signal for modem chip 0
O XMDMRST0
BZCONT Change control of sound source
O
Speaker mute control signal
O SPMUTE
Speaker volume control signal
O VOLC
Speaker volume control signal
O VOLB
Speaker volume control signal
O VOLA
O BZOUT Buzzer signal
O GAINC1 Reserved for 200V
O ERLY1 Reserved for 200V
Reserved for 200V
O DPMUTE1
O CML1 CML relay control signal
O TXMUTE1 Mute control for TX signal
O DPON1 Active choke control
O MONSEL Monitor select/DC character measured
—
N.C Not connect
P VDD Power supply
Function