Sharp UP-3301 Service Manual page 39

3) Pin description
Pin Signal In/
Symbol
No. name Out
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
Pin
Function
No.
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
UP-3301US CIRCUIT DESCRIPTION
– 37 –
Signal In/
Symbol
name Out
P41 GND In GND
P42 GND In GND
P43 GND In GND
P44 MCRINT In MCR interrupt signal
P45 GND In GND
P46 /SHEN In CKDC interface shift enable signal
P47 GND In GND
VSS GND In GND
P50 /ER Out DTR signal for RS-232 CH8
P51 /DR In DSR signal for RS-232 CH8
P52 /CS In CTS signal for RS-232 CH8
P53 /CD In DCD signal for RS-232 CH8
P54 /RR Out RR signal for RS-232 CH8
P55 /RS Out RTS signal for RS-232 CH8
P56 /CI In RI signal for RS-232 CH8
P57 GND Out GND
P60 /IPLON0 In From IPL SW of ER-A7RS2
P61 /IPLON1 In From IPL SW of UP-3301
P62 /SRESET In TCP/IP RESET signal
P63 NORDY In Flash Memory ready ("H" active)
P64 FVPON Out Flash Memory write protect ("L" active)
P65 BANK Out For IPL ROM
P66 /CLRES Out Clerk key reset output signal
P67 /STOP Out System reset output signal
VSS GND In GND
AVSS GND In GND
P70 GND In GND
P71 GND In GND
P72 GND In GND
P73 GND In GND
AVCC VCC In +5V
VCC VCC In +5V
/IRQ0 /IRQ0 In Interrupt signal 0
/IRQ1 /IRQ1 In Interrupt signal 1
/IRQ2 UASCK In Synchronizing shift clock signal for IR
/IRQ3 SCKI Out CKDC interface synchronizing shift
clock
RXD1 /UARX In RXD signal for RS-232 CH8
TXD1 /UATX Out TXD signal for RS-232 CH8
RXD2 RXDI In CKDC interface shift input data
TXD2 TXDI Out CKDC interface shift output data
VSS GND In GND
EXTAL EXTAL In Crystal oscillator connection 19.6MHz
XTAL XTAL In Crystal oscillator connection 19.6MHz
VSS GND In GND
X # Out System clock
E NC NC NC
/AS /AS Out Address strobe
RD /RD Out Read signal
/HWR /HWR Out Write signal (HIGH)
/LWR /LWR Out Write signal (LOW)
/RFSH /RFSH Out Refresh cycle signal
VCC VCC In +5V
MD0 IPLON0 In From IPL SW of ER-A7RS2
MD1 IPLON0 In From IPL SW of ER-A7RS2
MD2 /IPLON0 In From IPL SW of ER-A7RS2
/STBY VCC In +5V
Function