Read Sharp R-8740 (serv.man9) Service Manual online
R-8740M - 26
I-2 is a 2K-bit, serial memory, enabling CMOS to be erased/written electrically. This memory is constructed with
256 registers x 8bits, enabling individual access, read and write operations to be performed. Details of input/
output signal for I-2 are as shown in the following diagram.
256 registers x 8bits, enabling individual access, read and write operations to be performed. Details of input/
output signal for I-2 are as shown in the following diagram.
Table 2. Relation between Pin Nos, and Signals
Pin No.
Signal
I/O
Description
1-3
A0-A2
IN
Connected to +5V.
4
VSS
IN
Connected to GND.
5
SDA
IN/OUT
Serial data input/output : input/outputs data to I-1.
6
SCL
IN
Clock signal input : input/outputs serial data at every one pulse.
7
TEST
IN
Connected to GND.
8
VCC
IN
Connected to +5V.
Memory IC (I-2)
Click on the first or last page to see other R-8740 (serv.man9) service manuals if exist.