參數(shù)資料
型號(hào): AT89C51ID2-SLSUM
廠商: Atmel
文件頁數(shù): 110/157頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 64K 44PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 972
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲(chǔ)器容量: 64KB(64K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
56
AT89C51ID2
4289C–8051–11/05
Table 37. Baud Rate Selection Table UART
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 24. Internal Baud Rate
The baud rate for UART is token by formula:
TCLK
(T2CON)
RCLK
(T2CON)
TBCK
(BDRCON)
RBCK
(BDRCON)
Clock Source
UART Tx
Clock Source
UART Rx
0000
Timer 1
1000
Timer 2
Timer 1
0100
Timer 1
Timer 2
1100
Timer 2
X
010
INT_BRG
Timer 1
X
110
INT_BRG
Timer 2
0
X
0
1
Timer 1
INT_BRG
1
X
0
1
Timer 2
INT_BRG
X
1
INT_BRG
BRG
0
1
/6
BRL
/2
0
1
INT_BRG
SPD
BRR
SMOD1
auto reload counter
overflow
F
PER
Baud_Rate =
6(1-SPD)
32 (256 -BRL)
2SMOD1
F
PER
BRL = 256 -
6(1-SPD)
32 Baud_Rate
2SMOD1
F
PER
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