AT89C51ED2-RDTUM Atmel, AT89C51ED2-RDTUM Datasheet - Page 58

• Manufacturer Part Number: AT89C51ED2-RDTUM
• Description: IC 8051 MCU FLASH 64K 64VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51ED2-RDTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 50
• 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: 64-TQFP, 64-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: UART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 50
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• Cpu Family: AT89
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 40MHz
• Total Internal Ram Size: 2KB
• # I/os (max): 50
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: VQFP
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

58
AT89C51RD2/ED2
Table 14-13. BDRCON Register
BDRCON - Baud Rate Control Register (9Bh)
Reset Value = XXX0 0000b
Not bit addressable
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic
RBCK
TBCK
BRR
SRC
SPD
6
Bit
-
-
-
-
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit
Reserved
The value read from this bit is indeterminate. Do not set this bit
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Baud Rate Run Control bit
Cleared to stop the internal Baud Rate Generator.
Set to start the internal Baud Rate Generator.
Transmission Baud rate Generator Selection bit for UART
Cleared to select Timer 1 or Timer 2 for the Baud Rate Generator.
Set to select internal Baud Rate Generator.
Reception Baud Rate Generator Selection bit for UART
Cleared to select Timer 1 or Timer 2 for the Baud Rate Generator.
Set to select internal Baud Rate Generator.
Baud Rate Speed Control bit for UART
Cleared to select the SLOW Baud Rate Generator.
Set to select the FAST Baud Rate Generator.
Baud Rate Source select bit in Mode 0 for UART
Cleared to select F
Set to select the internal Baud Rate Generator for UARTs in mode 0.
5
-
BRR
OSC
4
/12 as the Baud Rate Generator (F
TBCK
3
RBCK
2
CLK PERIPH
SPD
1
/6 in X2 mode).
4235K–8051–05/08
SRC
0