參數(shù)資料
型號: MB89951PFM
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP64
封裝: 0.65 MM PITCH, QFP-64
文件頁數(shù): 72/110頁
文件大小: 619K
代理商: MB89951PFM
HARDWARE CONFIGURATION
2– 49
(e) Selection of input/output signal
The UART shares the data and clock input/output with the serial I/O.
Therefore, the output signal selected by the RSEL bit is output. At switching
between port output and peripheral output, the peripheral enable bit
selected by the RSEL bit becomes valid.
When the RSEL bit is 0, UART is selected.
When the RSEL bit is 1, serial I/O is selected.
(5) Precautions for UART
After canceling register initialization by reset, 11 shift clocks are required
to initialize the internal control section.
When using the external clock, the minimum pulse width is as follows:
CPU operating clock cycle
× 4
Table 2–9 Selection of Baud Rate (When Dedicated Baud Rate Generate Used)
RC2
RC1
RC0
Division
ratio
Baud rate (bps)
Remarks
4.9152 MHz
5 MHz
Clock
1/4
1/65
PDS division
1/64
1/8
1/16
CS,CR division
00
0
20
9600
78125
2404
00
1
21
4800
39063
1202
01
0
22
2400
19531
601
01
1
23
1200
9766
300
10
0
24
6004883150
10
1
25
300
2441
75
11
0
26
150
1221
38
11
1
27
75
610
19
Peripherals
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