Sharp FO-4500, Service Manual

Page: 99 / 192

LR38292 (IC16) 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
HD813201F
Input mode is selected when
HD813201F gets an access to image
bus (MAENB=L).
Data bus to memory (page memory) is
selected when gate array LR38292 gets
an access to the image bus.
132 MAD14
131 MAD13
130 MAD12
129 MAD11
128 MAD10
127 MAD9
126 MAD8
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
(page memory)
When HD813201F gets an access to the
image bus, address of MA21 thru MA16,
MAD15 thru MAD1 are converted to
Row/Column address in the page
memory (DRAM) and output.
When gate array LR38292 gets an
access to the image bus, Row/Column
address is output to the page memory
(DRAM).
154 DA10
153 DA9
152 DA8
151 DA7
150 DA6
149 DA5
148 DA4
147 DA3
146 DA2
145 DA1
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
smoothing/contracting
37 LMA9
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
smoothing/contracting
41 LMD6
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
signal to key scan and LCD driver on the
operation panel
25 LD14
24 LD13
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
panel
1 SEN6
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.
FO-4500H
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