Sharp UP-3301, Service Manual

Page: 39 / 112

UP-3301US CIRCUIT DESCRIPTION
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3) Pin description
Pin
No.
Symbol
Signal
name
In/
Out
Function
1 /RES /RESET In Reset signal
2 NMI NMI In Non-maskable interrupt input for SSP
interrupt input.
3 VSS GND In GND
4 D0 D0 I/O Data bus
5 D1 D1 I/O Data bus
6 D2 D2 I/O Data bus
7 D3 D3 I/O Data bus
8 D4 D4 I/O Data bus
9 D5 D5 I/O Data bus
10 D6 D6 I/O Data bus
11 D7 D7 I/O Data bus
12 D8 D8 I/O Data bus
13 D9 D9 I/O Data bus
14 D10 D10 I/O Data bus
15 D11 D11 I/O Data bus
16 D12 D12 I/O Data bus
17 D13 D13 I/O Data bus
18 D14 D14 I/O Data bus
19 D15 D15 I/O Data bus
20 VSS GND In GND
21 A0 A0 Out Address bus
22 A1 A1 Out Address bus
23 A2 A2 Out Address bus
24 A3 A3 Out Address bus
25 A4 A4 Out Address bus
26 A5 A5 Out Address bus
27 A6 A6 Out Address bus
28 A7 A7 Out Address bus
29 A8 A8 Out Address bus
30 A9 A9 Out Address bus
31 A10 A10 Out Address bus
32 A11 A11 Out Address bus
33 A12 A12 Out Address bus
34 A13 A13 Out Address bus
35 A14 A14 Out Address bus
36 A15 A15 Out Address bus
37 VSS GND In GND
38 A16 A16 Out Address bus
39 A17 A17 Out Address bus
40 A18 A18 Out Address bus
41 A19 A19 Out Address bus
42 A20 A20 Out Address bus
43 A21 A21 Out Address bus
44 A22 A22 Out Address bus
45 A23 A23 Out Address bus
46 VSS GND In GND
47 P30 /WAIT In Wait signal
48 P31 /BACK Out Bus control request acknowledge signal
49 P32 /BREQ In Bus control request signal
50 P33 DOPS In Drawer open signal
51 P34 /DR0 Out Option drawer open signal
52 P35 /DR1 Out Option drawer open signal
53 P36 NC NC NC
54 P37 NC NC NC
55 VCC VCC In +5V
56 P40 VCC In +5V
57 P41 GND In GND
58 P42 GND In GND
59 P43 GND In GND
60 P44 MCRINT In MCR interrupt signal
61 P45 GND In GND
62 P46 /SHEN In CKDC interface shift enable signal
63 P47 GND In GND
64 VSS GND In GND
65 P50 /ER Out DTR signal for RS-232 CH8
66 P51 /DR In DSR signal for RS-232 CH8
67 P52 /CS In CTS signal for RS-232 CH8
68 P53 /CD In DCD signal for RS-232 CH8
69 P54 /RR Out RR signal for RS-232 CH8
70 P55 /RS Out RTS signal for RS-232 CH8
71 P56 /CI In RI signal for RS-232 CH8
72 P57 GND Out GND
73 P60 /IPLON0 In From IPL SW of ER-A7RS2
74 P61 /IPLON1 In From IPL SW of UP-3301
75 P62 /SRESET In TCP/IP RESET signal
76 P63 NORDY In Flash Memory ready (“H” active)
77 P64 FVPON Out Flash Memory write protect (“L” active)
78 P65 BANK Out For IPL ROM
79 P66 /CLRES Out Clerk key reset output signal
80 P67 /STOP Out System reset output signal
81 VSS GND In GND
82 AVSS GND In GND
83 P70 GND In GND
84 P71 GND In GND
85 P72 GND In GND
86 P73 GND In GND
87 AVCC VCC In +5V
88 VCC VCC In +5V
89 /IRQ0 /IRQ0 In Interrupt signal 0
90 /IRQ1 /IRQ1 In Interrupt signal 1
91 /IRQ2 UASCK In Synchronizing shift clock signal for IR
92 /IRQ3 SCKI Out CKDC interface synchronizing shift
clock
93 RXD1 /UARX In RXD signal for RS-232 CH8
94 TXD1 /UATX Out TXD signal for RS-232 CH8
95 RXD2 RXDI In CKDC interface shift input data
96 TXD2 TXDI Out CKDC interface shift output data
97 VSS GND In GND
98 EXTAL EXTAL In Crystal oscillator connection 19.6MHz
99 XTAL XTAL In Crystal oscillator connection 19.6MHz
100 VSS GND In GND
101 X # Out System clock
102 E NC NC NC
103 /AS /AS Out Address strobe
104 RD /RD Out Read signal
105 /HWR /HWR Out Write signal (HIGH)
106 /LWR /LWR Out Write signal (LOW)
107 /RFSH /RFSH Out Refresh cycle signal
108 VCC VCC In +5V
109 MD0 IPLON0 In From IPL SW of ER-A7RS2
110 MD1 IPLON0 In From IPL SW of ER-A7RS2
111 MD2 /IPLON0 In From IPL SW of ER-A7RS2
112 /STBY VCC In +5V
Pin
No.
Symbol
Signal
name
In/
Out
Function