Service manual
FO-4700U
FO-47UC
5 – 10
LR38292 (IC10) Terminal descriptions
Pin Name I/O Function
111 MAENB I
Address enable signal of image bus of
HD813201F
112 CK16M I 16 MHz clock input
113 RDCDC O Register read signal (active H) of
HD813201F of CPU
114 RDCDCB O Register read signal (active L) of
HD813201F of CPU
139 MA20 I Address of image bus of HD813201F
138 MA19
137 MA18
136 MA17
135 MA16
133 MAD15 I/O Address/data of image bus of
132 MAD14 HD813201F
131 MAD13 Input mode is selected when
130 MAD12
HD813201F gets an access to image
129 MAD11 bus (MAENB=L).
128 MAD10
Data bus to memory (page memory) is
127 MAD9
selected when gate array LR38292 gets
126 MAD8 an access to the image bus.
124 MAD7
123 MAD6
122 MAD5
121 MAD4
120 MAD3
119 MAD2
118 MAD1
117 MAD0
155 DA11 I/O Address bus to memory of image bus
154 DA10 (page memory)
153 DA9
When HD813201F gets an access to the
152 DA8
image bus, address of MA21 thru MA16,
151 DA7 MAD15 thru MAD1 are converted to
150 DA6 Row/Column address in the page
149 DA5 memory (DRAM) and output.
148 DA4 When gate array LR38292 gets an
147 DA3
access to the image bus, Row/Column
146 DA2
address is output to the page memory
145 DA1 (DRAM).
144 DA0
156 DWEB O
Write signal to memory (page memory:
DRAM) of image bus
157 RAS1B O
RAS1 signal to memory (page memory:
DRAM) of image bus
158 RAS0B O
RAS0 signal to memory (page memory:
DRAM) of image bus
159 CASB O
CAS signal to memory (page memory:
DRAM) of image bus
140 DRMSIZE I
Setting of size of memory (page memory:
DRAM) of image bus
Low: 16 Mbits
High: 12 Mbits
141 DRMTYPE I Setting of type of memory (page
memory: DRAM) of image bus
Low: Address 8-bit type
High: address 12-bit type
(Valid only for DRMSIZE=L. Don’t care
for DRMSIZE=H.)
67 STVDB I
Serial scanner data valid range signal
68 SRVID I Serial scanner data
69 SCCLK I Serial scanner data transfer clock
51 PCURESB O Reset signal for printer unit
52 HSYNC I
Main scanning synchronous signal from
printer unit
53 EPRDYB I
Communication ready signal from printer
unit
54 PRRDYB I
Printing operation ready signal of printer
unit
55 TODB I Sub-scanning synchronous signal to
printer unit
Pin Name I/O Function
56 ETBSYB I Status sending signal of printer unit
57 CTBSYB O
Command sending signal to printer unit
58 PRINTB O
Printing start/continuation signal to printer
unit
59 PDATA O Printing image data to printer unit
60 CPRDYB O
Communication ready signal to printer
unit
63 XIN I
Clock input (quartz oscillator connection)
64 XOUT O
Clock output (quartz oscillator connection)
38 LMA10 O Address bus of line memory for
37 LMA9 smoothing/contracting
36 LMA8
34 LMA7
33 LMA6
32 LMA5
31 LMA4
30 LMA3
29 LMA2
28 LMA1
27 LMA0
40 LMD7 O Data bus of line memory for
41 LMD6 smoothing/contracting
42 LMD5
43 LMD4
44 LMD3
45 LMD2
46 LMD1
47 LMD0
39 LMWEB
26 LD15 I/O
Control/data bus and LED on/off control
25 LD14
signal to key scan and LCD driver on the
24 LD13
operation panel
23 LD12
22 LD11
19 LD10
18 LD9
17 LD8
15 LD7
14 LD6
13 LD5
12 LD4
11 LD3
10 LD2
9 LD1
8 LD0
160 SEN7 I
Key input detection signal of operation
1 SEN6
panel
2 SEN5
3 SEN4
4 SEN3
5 SEN2
6 SEN1
7 SEN0
49 MEMTST I Terminal for device test of integrated
memory
Low is set except in the device test mode.
50 TEST I
Terminal for device test
Low is set except in the device test mode.