AT89C51ID2-RDTIM datasheet(2/159 Pages) ATMEL

2 / 159 page

AT89C51ID2

4289A–8051–09/03

The 64 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

CC pin.

The AT89C51ID2 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 AT89C51ID2 has a Programmable Counter Array, an XRAM of 1792

bytes, a Hardware Watchdog Timer, SPI and Keyboard, a more versatile serial channel

that facilitates multiprocessor communication (EUART) and a speed improvement

mechanism (X2 mode).

The fully static design of the AT89C51ID2 allows to reduce system power consumption

by bringing the clock frequency down to any value, even DC, without loss of data.

The AT89C51ID2 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 peripherals 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 AT89C51ID2 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

AT89C51ID2

Flash (bytes)

XRAM (bytes)

TOTAL RAM

(bytes)

I/O

PLCC44/VQFP44

64K

1792

2048

PLCC68/VQFP64 (1)

For PLCC68 and VQFP64 packages, please contact Atmel sales office for availability.

64K

1792

2048

AT89C51ID2-RDTIM Datasheet(PDF) 2 Page - ATMEL Corporation