AT89C51ED2-SLSIM Atmel, AT89C51ED2-SLSIM Datasheet - Page 52
AT89C51ED2-SLSIM
Manufacturer Part Number
AT89C51ED2-SLSIM
Description
IC 8051 MCU FLASH 64K 44PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.ATWEBDVK-02RC.pdf
(137 pages)
Specifications of AT89C51ED2-SLSIM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
34
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
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14.4.1
Figure 14-5. Internal Baud Rate
52
AT89C51RD2/ED2
Internal Baud Rate Generator (BRG)
Table 14-3.
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.
Baud_Rate =
• The baud rate for UART is token by formula:
BRL = 256 -
(T2CON)
TCLK
X
X
X
0
1
0
1
0
1
F
Clk Periph
6
6
(1-SPD)
(1-SPD)
Baud Rate Selection Table UART
2
2
SMOD1
SMOD1
⋅ 32 ⋅ Baud_Rate
⋅ 32 ⋅ (256 -BRL)
(T2CON)
RCLK
÷ 6
X
X
X
0
0
1
1
0
1
⋅ F
⋅ F
PER
PER
BDRCON.1
SPD
0
1
(BDRCON)
TBCK
0
0
0
0
1
1
0
0
1
BDRCON.4
BRR
(BDRCON)
(8 bits)
(8 bits)
RBCK
BRG
BRL
0
0
0
0
0
0
1
1
1
Overflow
Clock Source
INT_BRG
INT_BRG
INT_BRG
UART Tx
Timer 1
Timer 2
Timer 1
Timer 2
Timer 1
Timer 2
÷ 2
SMOD1
PCON.7
0
1
4235K–8051–05/08
Clock Source
UART Rx
INT_BRG
INT_BRG
INT_BRG
Timer 1
Timer 1
Timer 2
Timer 2
Timer 1
Timer 2
INT_BRG
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