參數(shù)資料
型號(hào): μPD789407
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(jī)微控制器(8位單片微控制器)
文件頁數(shù): 68/128頁
文件大?。?/td> 607K
代理商: ΜPD789407
68
μ
PD789405, 789406, 789407
(2) Asynchronous serial interface mode register (ASIM)
The ASIM is used to make the settings related to asynchronous serial interface mode.
The ASIM is set using a 1-bit or 8-bit memory manipulation instruction.
A RESET input clears the ASIM to 00H.
Figure 5-33. Asynchronous Serial Interface Mode Register Format
TXE
0
1
Transmission control
TXE
RXE
PS1
PS0
CL
SL
0
0
ASIM
Symbol
Address
When reset
R/W
FF70H
00H
R/W
5
6
7
4
3
2
1
0
Transmission disabled
Transmission enabled
RXE
0
1
Reception control
Reception disabled
Reception enabled
PS1
0
0
1
1
Parity bit specification
PS0
0
1
0
1
No parity
At transmission, the parity bit is fixed to 0.
At reception, a parity check is not made; no parity error is reported.
Odd parity
Even parity
CL
0
1
Character length specification
7 bits
8 bits
SL
0
1
Transmission data stop bit length
1 bit
2 bits
Cautions 1. Bits 0 and 1 must be fixed to 0.
2.
If three-wire serial I/O mode is selected, the ASIM must be cleared to 00H.
3.
Before switching from one mode to another, stop both serial transmission and
reception.
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