參數(shù)資料
型號(hào): AT83C51RB2XXX-SLSIL
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: Microcontroller
中文描述: 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 38/81頁
文件大?。?/td> 1082K
代理商: AT83C51RB2XXX-SLSIL
39
AT80C51RD2/AT83C51Rx2
4113A–8051–09/02
Internal Baud Rate Generator
(BRG)
When the internal Baud Rate Generator is used, the Baud Rates are determined by the
BRG overflow depending on the BRL reload value, the value of SPD bit (Speed Mode)
in BDRCON register and the value of the SMOD1 bit in PCON register.
Figure 18.
Internal Baud Rate
The baud rate for UART is token by formula:
Peripheral clock
BRG
0
1
/6
BRL
/2
0
1
INT_BRG
BRR
auto reload counter
overflow
SPD
BaudRate
2
1
16
×
×
2
2
6
×
×
SPD
256
BRL
(
)
[
]
-----------------------------------------------------------------------------------------------------------
=
BRL
(
)
256
2
6
×
1
(
16
×
×
2
2
×
SPD
)
BaudRate
--------------------------------------------------------------------------------------------
=
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