Xerox WorkCentre XK50cx, Service Manual

Page: 35 / 109

4-8
Circuit
KS32C6400 Assigned I/O Ports & /Chip_SELECT Pins
* /External_Chip_Select : /ECS0 : Pin117 : /MCS : Modem Chip Select.
: /ECS1 : Pin118 : /USB_CS : USB Chip Select.
: /ECS2 : Pin119 : /IP_CS : DUO_IP2 Chip Select.
DESCRIPTION
PORT NAME PIN NO I/O SIGNAL NAME
GOP0/TXD1
GOP1/TXD2
GOP2/nEDACK1
GOP3/TONE
GOP4/nRST0
GOP5/nIOWR1
GOP6/nIOWR2
GOP7/nIORD1
GOP8/DRV_SDO
GOP9/CLKOUT
GOP10
GOP11/nHSC
GOP12/nEDACK2
GOP13/nECS3
GIP0/RXD1
GIP1/RXD2
GIP2/nEINT1
GIP3/nEINT2
GIP4/nEDREQ1
GIP5/nEDREQ2
GIP6/nEINT3
GIOP0/TCK
GIOP1/TMS
GIOP2/TDI
GIOP3/nTRST
GIOP4/TDO
GIOP5
GIOP6
GIOP7/nWAIT
EEDATA
EECLK
121
123
138
148
149
133
154
155
152
151
150
153
128
42
122
124
135
136
137
127
41
126
125
120
116
115
103
38
31
145
146
RESERVED
OPE_TXD
/XDACK
KEYCLICK
WATCHDOG
TONE_CTL
/OPE_RST
/BIAS_ON
/IP_RST
IP_CLK
/USB_RST
/SPK_CTL
/USB_XDACK
/DRAM_EN
RESERVED
OPE_RXD
/MIRQ
TX_INT
/XDREQ
/USB_XDREQ
/USB_INT
TCK
TMS
TDI
/TRST
TDO
/M_RST
/HOOK_OFF
/RING_DET
AMB_TEMP
TX_CTL
N.C N.C
SERIAL DATA FROM KS32C6400 TO OPE MICOM
IDLE STATE DMA ACKNOWLEDGE TO SCAN IP
KEYCLICK TONE
WATCHDOG RESET OFF WATCHDOG RESET
LINE MONITORING KEYCLICK
OPE RESET OFF OPE RESET
PRINT HEAD BIAS OFF PRINT HEAD BIAS ON
DUO_IP2 RESET OFF DUO_IP2 RESET ON
40MHz CLOCK TO DUO_IP2
RESET OFF : IDLE STATE RESET ON
AUDIO AMP OFF AUDIO AMP OFF
IDLE STATE DMA ACKNOWLEDGE TO USB IC
Disable DRAM to idle state Enable DRAM to read state
N.C N.C
SERIAL DATA FROM OPE MICOM TO KS32C6400
MODEM INTERRUPT INACTIVE MODEM INTERRUPT ACTIVE
IDLE TX MOTOR INTERUPT
IDLE DMA REQUEST FROM SCAN IP
IDLE DMA REQUEST FROM USB IC
IDLE USB IC INTERUPT
RESERVED TEST PIN FOR ICE(JTAG)
RESERVED TEST PIN FOR ICE(JTAG)
RESERVED TEST PIN FOR ICE(JTAG)
RESERVED TEST PIN FOR ICE(JTAG)
RESERVED TEST PIN FOR ICE(JTAG)
MODEM RESET OFF : IDLE STATE MODEM RESET ON
Ext. Phone Hook ON Ext. Phone Hook OFF
- RING DETECTED
AMBIENT TEMPERATURE DATA FROM HEAD
RX PASS SIGNAL TX LINE SIGNAL
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
O
O
O
O
O
O
H L