T81L0003B

Features:

· Compatible with MCS-51
· Embedded 8K Bytes OTP ROM
· 256 x 8-bit Internal RAM
· 13 Programmable I/O Lines for 18-pin Package
· 2 16-bit Timer/Counter & 1 16-bit Timer
· 2 External Interrupt Input
· Programmable Serial UART Interface
· Low Power Idle & Power-down Modes
· Watch-dog Timer
· On-chip Crystal & RC Oscillator (Selectedby Bonding Option)
· Internal Power-on Reset and External Reset Supported
· SOP18/DIP18 Package
· 3.3V Operating Voltage


Pinout




Description

The T81L0003B is 8-bit microcontroller designed and developed with low power and high speed CMOS technology. It contains a 8K bytes OTP ROM, a 256 × 8 RAM, 13 I/O lines, a watchdog timer, two 16-bit counter/timers, a seven source, two-priority level nested interrupt structure, a full duplex UART, and an on-chip oscillator and clock circuits.

In addition, the T81L0003B has two selectable modes of power reduction-idle mode and power-down mode. The idle mode freezes the CPU while allowing the RAM, timers, serial port, and interrupt system to continue functioning. The
power-down mode saves the RAM contents but freezes the oscillator, causing all other chip functions to be inoperative