參數(shù)資料
型號: μPD789186
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): 72/146頁
文件大?。?/td> 630K
代理商: ΜPD789186
Preliminary Product Information
72
μ
PD789186, 789187, 789196, 789197
The transmission and reception clock pulses used to generate the baud rate are obtained by dividing the
frequency of the main system clock pulse or a signal input to the ASCK20 pin.
(i)
Generating transmission and reception clock pulses for baud rates based on the main system
clock
The frequency of the main system clock is divided to generate the transmission and reception clock
pulses. The baud rate generated based on the main system clock is determined using the following
expression.
[Baud rate] = [Hz]
f
X
: Main system clock oscillation frequency
n : Value specified at TPS200 to TPS203 (2
n
8)
Table 6-14. Relationships between Main System Clock Frequencies and Baud Rates (Example)
Error (%)
f
X
= 5.0 MHz
f
X
= 4.9152 MHz
1,200
70H
1.73
0
2,400
60H
4,800
50H
9,600
40H
19,200
30H
38,400
20H
76,800
10H
Baud rate
(bps)
BRGC20 setting
f
2
×
8
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