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PCB-MAIN(3/3)
IC471 NC7SZ08P5X
1
5
A
Vcc
2
B
4
3
GND
Y
IC472 CAT24WC128J
5
Start/Stop
SDA
Logic
7
WP
6
SCL
State Counters
1
NC
2
NC
3
NC
8
Vcc
4
Vss
IC473,IC474 NC7SB3157P6X
1
B1
2
GND
3
B0
Function Table
Inpu t (S)
Fun ct ion
B
L
0
B
H
1
H: HIGH Logic Level
L: LO W Logic Level
Function Table
Inputs Output
A
B
Y
L
L
L
L
H
L
H
L
L
H
H
H
H= HIGH Logic Level
L= LOW Logic Level
Dout ACK
(Open drain)
Word Address Buffers
Control Logic
XDEC
6
S
5
Vcc
4
A
Connected to A
Connected to A
Sense Amps
Shift Registers
Column Decorders
512
256
EEPROM
(256x512)
Data In Storage
High Voltage
&
Timing Control
DPX-530
61
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