AT89C51RE2-RLTUM Atmel, AT89C51RE2-RLTUM Datasheet - Page 34

• Manufacturer Part Number: AT89C51RE2-RLTUM
• Description: MCU 8051 128K FLASH 44-VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RE2-RLTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 8 KB
• Interface Type: UART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 34
• 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
• Development Tools By Supplier: AT89OCD-01
• Minimum Operating Temperature: - 40 C
• Height: 1.45 mm
• Length: 10.1 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 10.1 mm
• For Use With: AT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Fuse Configuration Byte
(FCB)
34
AT89C51RE2
The Fuse configuration byte is a part of FM0.
The 8 bits read/written by software (from FM0 or RM0) and written by hardware in parallel mode.
Table 20. Fuse Configuration Byte (FCB)
Number
Bit
6-3
2-0
X2
7
7
Mnemonic
BRV2-0-
Bit
X2
-
6
-
Description
X2 Mode
Unused
Boot Reset Vector
These bits allow to configure the reset vector of the product according to the following
values:
1 1 1: Reset at address 0x0000 of FM0 with Bank0 mapped
1 1 0: Reset at address 0xFFFC of Bank 0
1 0 1: Reset at address 0xFFFC of Bank 1
1 0 0: Reset at address 0xFFFC of Bank 2
0 1 1: Reset at address 0x0000 of RM0 (Internal ROM bootloader execution)
0 1 0: Reserved for further extension but same as 1 1 1
0 0 1: Reserved for further extension but same as 1 1 1
0 0 0: Reserved for further extension but same as 1 1 1
5
Programmed (‘0’ value) to force X2 mode (6 clocks per instruction) after reset
Unprogrammed (‘1’ value) to force X1 mode, Standard Mode, after reset (Default)
-
4
-
3
-
BRV2
2
BRV1
1
7663E–8051–10/08
BRV0
0