AT89C5131A-S3SIM Atmel, AT89C5131A-S3SIM Datasheet - Page 73

• Manufacturer Part Number: AT89C5131A-S3SIM
• Description: IC 8051 MCU FLASH 32K USB 52PLCC
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5131A-S3SIM

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: LED, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-05 - KIT STARTER FOR AT89C5131
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

15.3.1
15.3.2
Figure 15-5. Internal Baud Rate
4337K–USB–04/08
(T2CON)
TCLK
X
X
X
0
1
0
1
0
1
Baud Rate Selection Table for UART
Internal Baud Rate Generator (BRG)
Peripheral Clock
BRR
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.
Table 15-1.
(T2CON)
RCLK
• The baud rate for UART is token by formula:
FE/SM0
0
0
1
1
0
1
X
X
X
7
SCON Register – SCON Serial Control Register (98h)
SM1
/6
6
(BRL) = 256
Baud_Rate =
(BDRCON)
TBCK
0
0
0
0
1
1
0
0
1
SPD
0
1
SM2
5
auto reload counter
-
2 x 6
2 x 6
(1-SPD)
(1-SPD)
REN
BRG
BRL
(BDRCON)
2
2
4
SMOD1
RBCK
SMOD1
0
0
0
0
0
0
1
1
1
overflow
x 16 x Baud_Rate
x 16 x [256 - (BRL)]
x F
x
F
CLK PERIPH
CLK PERIPH
TB8
3
AT89C5130A/31A-M
/2
Clock Source
INT_BRG
INT_BRG
INT_BRG
UART Tx
Timer 1
Timer 2
Timer 1
Timer 2
Timer 1
Timer 2
RB8
2
SMOD1
0
1
INT_BRG
TI
1
Clock Source
UART Rx
INT_BRG
INT_BRG
INT_BRG
Timer 1
Timer 1
Timer 2
Timer 2
Timer 1
Timer 2
RI
0
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