NAD C 720BEE - ICS Block Diagram

uPC1237HA
MAIN BOARD: IC44
Overload Detector
Output Offset Detector
Switch for latch/automatic --reset
Flip--Flop
VCC ON
MUTE
AC---OFF detector
Relay driver
1
2
34
5
78
6
GND
VCC
AT24C64A
KEY BOARD: IC705
PIN CONFIGURATION
1
2
3
45
6
7
8VCC
WP
SCL
SDAGND
A0
A1
A2
PIN NAME
A0--A2
SDA
SCL
WP
ADDRESS INPUTS
FUNCTION
SERIAL DATA
SERIAL CLOCK INPUT
WRITE PROTECT
WP
Vcc
GND
SCL
SDA
A0
A1
A2
START
STOP
LOGIC
LOAD
SERIAL CONTROL LOGIC
EN
H.V. PUMP/TIMING
DATA RECOVERY
X DEC
EEPROM
SERIAL MUX
Dout/ACK
LOGIC
Dout
Din
Y DEC
DATA WORD
ADRR/COUNTER
INC
LOAD
COMP
R/W
DEVICE
ADRRESS
COMPARATOR
ICS BLOCK DIAGRAM
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