10-8
October 2000 © TOSHIBA TEC
MR-3011/3012 DESCRIPTION OF CIRCUITS
10.10 EEPROM Circuit
This circuit is an EEPROM to store ADF data and its peripheral circuit.
IC12 is a memory to store the adjustment value for reflection-type sensors, and data are sent/received between
IC12 and CPU using a 4-line type serial interface. Data saved in the IC12 is not erased even if the power is
turned OFF.
IC12-1pin (CS) is a chip selection terminal and its level is "H" when data are being sent/received.
IC12-2pin (CLK) is a serial clock terminal, and the serial data are sent in synchronization with the clock input
which is input to this terminal.
IC12-3pin (DI) is a input terminal for serial data and 4pin (DO) is an output terminal for serial data.
+5V
D0
DI
5
6 RA1.3
4
DO
CS
1
CLK
2
DI
3
IC12
NC1
6
NC2
7
SGND
CLK
CS
1
2
R108
RA1.4
8
7
RA1.1
1
2
SGND
#Chapter_10.p65
10/3/00, 5:09 PM
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