Table of Contents
Advertisement
19.3 Serial Interface Channel 2 Control Registers
Serial interface channel 2 is controlled by the following four registers.
• Serial operating mode register 2 (CSIM2)
• Asynchronous serial interface mode register (ASIM)
• Asynchronous serial interface status register (ASIS)
• Baud rate generator control register (BRGC)
(1) Serial operating mode register 2 (CSIM2)
This register is set when serial interface channel 2 is used in the 3-wire serial I/O mode.
CSIM2 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets CSIM2 to 00H.
Symbol
7
6
5
CSIM2 CSIE2
0
0
Cautions 1. Ensure that bits 0 and 3 to 6 are set to 0.
2. When UART mode is selected, CSIM2 should be set to 00H.
438
CHAPTER 19 SERIAL INTERFACE CHANNEL 2
Figure 19-3. Serial Operating Mode Register 2 Format
4
3
2
1
CSIM
0
0
CSCK
22
0
Address
After Reset
FF72H
00H
0
CSCK
Serial Operating Mode Selection
0
UART mode
1
3-wire serial I/O mode
First Bit Specification
CSIM22
0
MSB
1
LSB
CSIE2
Operation Control in 3-wire Serial I/O Mode
0
Operation stopped
1
Operation enabled
R/W
R/W
Advertisement
Table of Contents
