Table of Contents
Advertisement
15.4 Serial Interface Channel 0 Operations
The following four operating modes are available to the serial interface channel 0.
• Operation stop mode
• 3-wire serial I/O mode
• SBI mode
• 2-wire serial I/O mode
15.4.1 Operation stop mode
Serial transfer is not carried out in the operation stop mode. Thus, power dissipation can be reduced. The serial
I/O shift register 0 (SIO0) does not carry out shift operation either and thus it can be used as normal 8-bit register.
In the operation stop mode, the P25/SI0/SB0, P26/SO0/SB1 and P27/SCK0 pins can be used as normal input/
output ports.
(1) Register setting
The operation stop mode is set with the 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.
Symbol
CSIM0 CSIE0
www.DataSheet4U.com
R/W
CSIE0
CHAPTER 15 SERIAL INTERFACE CHANNEL 0 ( µ PD78014 Subseries)
<7>
<6>
<5>
4
COI
WUP CSIM04 CSIM03 CSIM02 CSIM01 CSIM00
Serial Interface Channel 0 Operation Control
0
Operation stopped
1
Operation enable
3
2
1
0
Address
When Reset
R/W
FF60H
00H
R/W
277
Advertisement
Table of Contents
