CHAPTER 13 SERIAL INTERFACE CHANNEL 0
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User’s Manual U11302EJ4V0UM
13.4 Operations of Serial Interface Channel 0
The following four operating modes are available for serial interface channel 0.
•
Operation stop mode
•
3-wire serial I/O mode
•
SBI mode
•
2-wire serial I/O mode
13.4.1 Operation stop mode
Serial transfer is not carried out in the operation stop mode. Thus, power consumption can be reduced. Serial
I/O shift register 0 (SIO0) does not carry out shift operations and can be used as an ordinary 8-bit register.
In the operation stop mode, the P25/SI0/SB0, P26/SO0/SB1, and P27/SCK0 pins can be used as ordinary
I/O ports.
(1) Register setting
The operation stop mode is set by serial operating mode register 0 (CSIM0).
CSIM0 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets CSIM0 to 00H.
R/W
CSIE0
Serial interface channel 0 operation control
0
Operation stopped
1
Operation enabled
<6>
<5>
4
3
2
1
0
<7>
Symbol
CSIM0 CSIE0 COI
WUP
CSIM04 CSIM03 CSIM02 CSIM01 CSIM00
FF60H 00H R/W
Address After reset R/W
Содержание mPD780208 Subseries
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