CHAPTER 9 SERIAL INTERFACE 00
User's Manual U11919EJ3V0UM00
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9.3 Serial Interface 00 Control Register
The following four types of registers are used to control serial interface 00.
•
Serial operation mode register 00 (CSIM00)
•
Asynchronous serial interface mode register 00 (ASIM00)
•
Asynchronous serial interface status register 00 (ASIS00)
•
Baud rate generator control register 00 (BRGC00)
(1)
Serial operation mode register 00 (CSIM00)
This register is set when using serial interface 00 in the 3-wire serial I/O mode.
CSIM00 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input clears CSIM00 to 00H.
Figure 9-3. Serial Operation Mode Register 00 Format
CSIE00
0
1
Operation Control in 3-Wire Serial I/O Mode
CSIE00
0
0
0
0
DIR00 CSCK00
0
CSIM00
Symbol
Address
After Reset
R/W
FF72H
00H
R/W
<7>
6
5
4
3
2
1
0
Operation stop
Operation enable
DIR00
0
1
Start Bit Specification
MSB
LSB
CSCK00
0
1
Clock Selection in 3-Wire Serial I/O Mode
Input clock to SCK0 pin from external
Dedicated baud rate generator output
Cautions 1. Be sure to set bit 0 and bits 3 to 6 to 0.
2. Set 00H to CSIM00 at the UART mode.
Summary of Contents for mPD789026 Subseries
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