AT89C51RC2-SLRUM Atmel, AT89C51RC2-SLRUM Datasheet - Page 48
AT89C51RC2-SLRUM
Manufacturer Part Number
AT89C51RC2-SLRUM
Description
IC 8051 MCU 32K FLASH 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51RB2-RLTIL.pdf
(127 pages)
Specifications of AT89C51RC2-SLRUM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1.25K 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
For Use With
AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-11 - KIT STARTER FOR AT89C51RX2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Other names
AT89C51RC2-SLRUMTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51RC2-SLRUM
Manufacturer:
Atmel
Quantity:
500
Internal Baud Rate Generator
(BRG)
Figure 21. Internal Baud Rate
48
AT89C51RB2/RC2
Table 32. Baud Rate Selection Table UART
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 =
F
BRL = 256 -
Clk Periph
(T2CON)
The baud rate for UART is token by formula:
TCLK
0
1
0
1
X
X
0
1
X
6
6
(1-SPD)
(1-SPD)
÷ 6
2
2
(T2CON)
SMOD1
SMOD1
⋅ 32 ⋅ Baud_Rate
⋅ 32 ⋅ (256 -BRL)
RCLK
BDRCON.1
X
X
X
0
0
1
1
0
1
SPD
⋅ F
⋅ F
0
1
PER
PER
BDRCON.4
(BDRCON)
BRR
TBCK
0
0
0
0
1
1
0
0
1
(8 bits)
(8 bits)
BRG
BRL
(BDRCON)
RBCK
0
0
0
0
0
0
1
1
1
Overflow
Clock Source
UART Tx
INT_BRG
INT_BRG
INT_BRG
÷ 2
Timer 1
Timer 2
Timer 1
Timer 2
Timer 1
Timer 2
SMOD1
PCON.7
0
1
4180E–8051–10/06
Clock Source
UART Rx
INT_BRG
INT_BRG
INT_BRG
Timer 1
Timer 1
Timer 2
Timer 2
Timer 1
Timer 2
INT_BRG