參數(shù)資料
型號: μPD789405
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 67/128頁
文件大?。?/td> 607K
代理商: ΜPD789405
67
μ
PD789405, 789406, 789407
5.9.3 Serial interface channel 0 control registers
Serial interface channel 0 is controlled by the following registers.
Serial operation mode register 0 (CSIM0)
Asynchronous serial interface mode register (ASIM)
Asynchronous serial interface status register (ASIS)
Baud rate generator control register (BRGC)
(1) Serial operation mode register 0 (CSIM0)
CSIM0 is used to make the settings related to three-wire serial I/O mode.
CSIM0 is set using a 1-bit or 8-bit memory manipulation instruction.
A RESET input clears CSIM0 to 00H.
Figure 5-32. Serial Operation Mode Register 0 Format
CSIE0
0
1
Three-wire serial I/O mode operation control
CSIE0
0
0
0
0
DIR0 CSCK
0
CSIM0
Symbol
Address
When reset
R/W
FF72H
00H
R/W
6
7
5
4
3
2
1
0
Operation disabled
Operation enabled
DIR0
0
1
First-bit specification
MSB
LSB
CSCK
0
1
Three-wire serial I/O mode clock selection
External clock pulse input to the SCK0 pin
Output of the dedicated baud rate generator
Cautions 1. Bit 0 and bits 3 to 6 must be fixed to 0.
2. CSIM0 must be cleared to 00H, if UART mode is selected.
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