Sharp ER-A450T Service Manual page 21

Pin Signal
In/Out
No. name
130 GND — GND
131 GND — GND
132 GND — GND
133 BA6 O Address bus 6 for PB-RAM
134 BA5 O Address bus 5 for PB-RAM
135 BA4 O Address bus 4 for PB-RAM
136 BA3 O Address bus 3 for PB-RAM
137 BA2 O Address bus 2 for PB-RAM
138 BA1 O Address bus 1 for PB-RAM
139 PHAI I TPRC1 clock input pin (9.83 MHz)
140 Vcc — +5V
141 Vcc — +5V
142 Vcc — +5V
143 BA0 O Address bus 0 for PB-RAM
2-5. OPC2
1) Pin configuration
SL00 1
SL01 2
3
SL02
SL10 4
SL11 5
SL12 6
SL20 7
SL21
8
SL22 9
SL30 10
SL31 11
SL32 12
/CD0 13
BRK0 14
TRNEMP0
15
RCVRDY0 16
TRNRDY0
17
/CTS0 18
RCVDT0 19
VCC 20
GND 21
/CI0
22
/RTS0 23
/CS0
24
/CD1 25
BRK1 26
TRNEMP1 27
RCVRDY1 28
TRNRDY1
29
/CTS1 30
31
RCVDT1
/CI1 32
/RTS1 33
/CS1 34
35
/CD2
TRNEMP2
36
RCVRDY2 37
TRNRDY2
38
CTS2Z 39
RCVDT2 40
Function
4 – 13
Pin Signal
In/Out
No. name
144 BD7 I/O Data bus 7 for PB-RAM
145 BD6 I/O Data bus 6 for PB-RAM
146 BD5 I/O Data bus 5 for PB-RAM
147 GND — GND
148 BD4 I/O Data bus 4 for PB-RAM
149 BD3 I/O Data bus 3 for PB-RAM
150 GND — GND
151 GND — GND
152 GND — GND
153 BD2 I/O Data bus 2 for PB-RAM
154 BD1 I/O Data bus 1 for PB-RAM
155 BD0 I/O Data bus 0 for PB-RAM
156 BRAS O PB-RAM chip select: Active HIGH (Nu)
157 BRAS O PB-RAM chip select: Active LOW
158 RESET I TPRC1 reset signal
159 GND — GND
160 NU — GND
Function
120 TRNDTB
119 /CSB
118
GND
117 SYCBKA
116
TRNEMPA
115 RCVRDYA
114 TRNRDYA
113 /DSRA
112 /CTSA
111
RCVDTA
110 /RTSA
109
/DTRA
108 TRNDTA
107
/CSA
106 UTST
105 DBTST
104 RCVCLK
103 TRNCLK
102
RES
101 GND
100
VCC
99 /W
98 /R
97 DB7
96 DB6
95
DB5
94 DB4
93
GND
DB3
92
91 DB2
90
DB1
89 DB0
88
/RES
87 /WR
86
/RD
85 /OPTCS
84
A5
83 A4
82 A3
81 A2