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3) When a card has been scanned, interrupts for the MCR interface
are activated.
4) The main CPU reads taken card data from the FIFO buffer in the
interrupt handling. The main CPU can read the data using IN com-
mand of 0WAIT.
Even after the LCR which is the last character of a card was read,
10 to 20 characters of "0" remains in the FIFO buffers. So it is nec-
essary to reset the FIFO before read enabling the next card after
reading the LCR of the last data.
5) This MCR interface does not read the next card until interrupts are
reset by the main CPU.
17-4. PIN ASSIGNMENT
NC
1
Y737I
2
GND
3
Y737O
4
GND
5
IS3#
6
IS4#
7
KRES1
8
HTS1
9
STH1
10
SCK1
11
GND
12
HOP2
13
HOP1
14
HIP2
15
HIP1
16
HIP0
17
SW0
18
SW1
19
SW2
20
SW3
21
SW4
22
SW5
23
SW6
24
SW7
25
GND
26
VDD
27
TXD3
28
RXD3
29
DTR3#
30
DSR3#
31
RTS3#
32
CTS3#
33
DCD3#
34
RI3#
35
GND
36
TXD4
37
RXD4
38
39
DTR4#
DSR4#
40
RTS4#
41
DTS4#
42
DCD4#
43
RI4#
44
GND
45
VDD
46
TXD2
47
RXD2
48
DTR2#
49
DSR2#
50
RTS2#
51
CTS2#
52
(8) VFD Interface
The PSC2 has 2 UARTs (8250) as Mega Macro Function. PSC+80XH
is used as the I/O address for this interface. Only TXD and DTR are out-
putted as UART signals from the PSC2.
UART3: PSC2+(800-807H)
UART4: PSC2+(808-80FH)
(9) Analog Touch Panel Interface
The PSC2 has a UART (8250) as Mega Macro Function. PSC+81XH is
used as the I/O address for this interface. TXD, RXD, DTR, and CTS
are inputted and outputted as UART signals from the PSC2.
UART5: PSC2+(810-817H)
(10) General Purpose I/O Port
A 6-bit I/O port used for general purposes is configured in the PSC.
(11) Mode Key Control and Clerk Key Control (NotUsed)
PSC2
LZ9AM22
UP-5900VS CIRCUIT DESCRIPTION
5 – 44
156
GND
155
SA23
154
SA22
153
SA21
152
SA20
151
SA19
150
SA18
148
SA17
148
SA16
147
GND
146
SA15
145
SA14
144
SA13
143
SA12
142
SA11
141
SA10
140
SA9
139
GND
138
SA8
137
SA7
136
SA6
135
SA5
134
SA4
133
SA3
132
SA2
131
GND
130
VDD
129
SA1
128
SA0
127
SD7
126
SD6
125
SD5
124
SD4
123
SD3
122
SD2
121
SD1
120
SD0
119
GND
118
IRQ15
117
IRQ11
116
IRQ10
115
IRQ9
114
IRQ4
113
IRQ3
112
REFRESH#
111
RESETDRV
110
VDD
109
GND
108
MCS16#
107
IOW#
106
IOR#
105
MEMW#
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