AT89C51RE2-RLTUM Atmel, AT89C51RE2-RLTUM Datasheet - Page 2

• 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

Description
2
AT89C51RE2
AT89C51RE2 is a high performance CMOS Flash version of the 80C51 CMOS single chip 8-bit
microcontroller. It contains a 128 Kbytes Flash memory block for program.
The 128 Kbytes Flash memory can be programmed either in parallel mode or in serial mode with
the ISP capability or with software. The programming voltage is internally generated from the
standard V
The AT89C51RE2 retains all features of the Atmel 80C52 with 256 bytes of internal RAM, a 10-
source 4-level interrupt controller and three timer/counters.
In addition, the AT89C51RE2 has a Programmable Counter Array, an XRAM of 8192 bytes, a
Hardware Watchdog Timer, SPI and Keyboard, two serial channels that facilitates multiproces-
sor communication (EUART), a speed improvement mechanism (X2 mode) and an extended
stack mode that allows the stack to be extended in the lower 256 bytes of XRAM.
The fully static design of the AT89C51RE2 allows to reduce system power consumption by
bringing the clock frequency down to any value, even DC, without loss of data.
The AT89C51RE2 has 2 software-selectable modes of reduced activity and 8-bit clock prescaler
for further reduction in power consumption. In the Idle mode the CPU is frozen while the periph-
erals and the interrupt system are still operating. In the power-down mode the RAM is saved and
all other functions are inoperative.
The added features of the AT89C51RE2 make it more powerful for applications that need pulse
width modulation, high speed I/O and counting capabilities such as alarms, motor control,
corded phones, smart card readers.
Table 1. Memory Size and I/O pins
AT89C51RE2
PLCC44
VQFP44
CC
pin.
Flash (bytes)
128K
XRAM (bytes)
8192
TOTAL RAM (bytes)
8192 + 256
7663E–8051–10/08
I/O
34