Sharp AR-151

2. Circuit descriptions
A. Man PWB (MCU)
(1) CPU signal table
PIN
No.
Signal
code
Input/output Operating
1 /CS1 Output Chip Select for SRAM
2 /CS0 Output Chip Select for EPROM
3 D-GND
4 D-GND
55V
6 A0 Output Address Bus (NC-pull up)
7 A1 Output Address Bus
8 A2 Output Address Bus
9 A3 Output Address Bus
10 D-GND
11 A4 Output Address Bus
12 A5 Output Address Bus
13 A6 Output Address Bus
14 A7 Output Address Bus
15 A8 Output Address Bus
16 A9 Output Address Bus
17 A10 Output Address Bus
18 A11 Output Address Bus
19 D-GND
20 A12 Output Address Bus
21 A13 Output Address Bus
22 A14 Output Address Bus
23 A15 Output Address Bus
24 A16 Output Address Bus
25 A17 Output Address Bus
26 A18 Output Address Bus
27 A19 Output Address Bus (NC-pull up)
28 D-GND
29 A20 Output Address Bus (NC-pull up)
30 NC-pull up
31 (SPPD)
Interruption
level input
SPF Paper Pass Detector
32 USB-IN Input USB Connector-In Detect
33 (MHPS)
Interruption
level input
Mirror Home Position Sensor
34
/CPU
SYNC
Interruption
level input
Horizontal Synchronous (from
G/A)
35 D-GND
36 D-GND
37 ZC
Interruption
level input
Zero-cross signal
38 /ASICINT
Interruption
level input
Intterupt from G/A
PIN
No.
Signal
code
Input/output Operating
39 5V
40 D0
Data
input/output
Data Bus
41 D1
Data
input/output
Data Bus
42 D2
Data
input/output
Data Bus
43 D3
Data
input/output
Data Bus
44 D-GND
45 D4
Data
input/output
Data Bus
46 D5
Data
input/output
Data Bus
47 D6
Data
input/output
Data Bus
48 D7
Data
input/output
Data Bus
49 D8
Data
input/output
Data Bus
50 D9
Data
input/output
Data Bus
51 D10
Data
input/output
Data Bus
52 D11
Data
input/output
Data Bus
53 D-GND
54 D12
Data
input/output
Data Bus
55 D13
Data
input/output
Data Bus
56 D14
Data
input/output
Data Bus
57 D15
Data
input/output
Data Bus
58 5V
59
(OP-
DATA)
Output
Data Signal for Operation
Panel
60 FTXD Output TXD for Additional Board
61 FRTS Output RTS for Additional Board
62 FRXD Input RXD for Additional Board
63 (OP-CLK) Output Clock for Operation Panel
64 TMON Output
Power Supply Signal for Toner
Motor Driver IC
65 D-GND
66 FCTS Input CTS for Additional Board
67 D-GND
68 D-GND
AR-F152
12 – 4