Control Circuit - Onkyo TX-SR875 Service Manual

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IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS -73
Q8105, Q8125, Q8155, Q8175: BR24L02FV-W(256x8 bit EEPROM)
BLOCK DIAGRAM AND PIN CONFIGURATION
A0
1
Address
A1
2
Decorder
A2
3
High-voltage
4
GND
generation circuit
TERMINAL DESCRIPTION
Terminal
Vcc
GND
A0,A1,A2
SCL
SDA
WP
2k Bit EEPROM Array
8bit
Slave word
8bit
address register
START
STOP

Control circuit

Power voltage
detection
I/O
Function
-
Apply a power source
-
Ground terminal
I
Slave address setting terminal
I
Serial clock input
Slave and word address.
I/O
Serial data input and output
I
Write protect terminal
8
8bit
Data
7
register
6
ACK
5
TX-SR875
Vcc
WP
SCL
SDA

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