T81L0003B-AD

tm ! ! ! ! ! ! ! ! ! ! ! ! ! TE CH T81L0003B 8-bit MCU 1. 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 (Selected by Bonding Option) Internal Power-on Reset and External Reset Supported SOP18/DIP18 Package 3.3V Operating Voltage 2. General 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. TM Technology Inc. reserves the right to change products or specifications without notice. P. 1 Publication Date: NOV. 2005 Revision:A tm TE CH T81L0003B 3. Block Diagram RAM Addr. Register RAM OTP ROM B Register ACC Stack Pointer Program Address Register TMP2 W DT TMP1 Buffer ALU PC Incrementer Interrupt, Serial port, and Timer Block PSW Program Counter DPTR RST Timing & Control Instruction Register Port 3 Latch Port 1 Latch OSC Port 3 Drivers P ort 1 Drivers XTAL1 XTAL2 P3.0 -P3.4 P1.0 -P1.7 TM Technology Inc. reserves the right to change products or specifications without notice. P. 2 Publication Date: NOV. 2005 Revision:A tm TE CH T81L0003B 4. Pin Configuration RST/VPP ( RXD) P3.0 (TXD) P3.1 XOUT XIN (INT0) P3.2 (INT1) P3.3 (T0) P3.4 GND 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VCC P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 DIP-18/SOP-18 For Crystal Oscillator T81L0003B-BK/ T81L0003B-BD RST/VPP (RXD) P3.0 (TXD) P3.1 OSCR STOP (INT0) P3.2 (INT1) P3.3 (T0) P3.4 GND 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VCC P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 DIP-18/SOP-18 For RC Oscillator T81L0003B-AK/ T81L0003B-AD TM Technology Inc. reserves the right to change products or specifications without notice. P. 3 Publication Date: NOV. 2005 Revision:A tm Number (20-Pin) 1 2 3 4(BK,BD) 4(AK,AD) 5(BK,BD) 5(AK,AD) 6 7 8 9 10 11 12 13 14 15 16 17 18 TE CH T81L0003B 5. Pin Description Name RST/VPP P3.0/(RXD) P3.1/(TXD) XOUT OSCR XIN STOP P3.2/(INT0) P3.3/(INT1) P3.4/(T0) GND P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 VCC Type I I/O I/O O I I O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O Description Reset signal input or programming supply voltage input. General-purpose I/O pin (Default) or Serial input port. General-purpose I/O pin (Default) or Serial output port. Crystal oscillator output terminal. RC oscillator external resister connect pin. Crystal oscillator input terminal. Stop RC oscillator network. General-purpose I/O pin (Default) or External interrupt source 0. General-purpose I/O pin (Default) or External interrupt source 1. General-purpose I/O pin (Default) or Timer 0 external input pin. Ground General-purpose I/O pin General-purpose I/O pin General-purpose I/O pin General-purpose I/O pin General-purpose I/O pin General-purpose I/O pin General-purpose I/O pin General-purpose I/O pin 3.3V power supply. TM Technology Inc. reserves the right to change products or specifications without notice. P. 4 Publication Date: NOV. 2005 Revision:A tm TE CH T81L0003B 6. Temperature Limit Ratings Parameter Operating temperature Range Storage Temperature Range Rating -40 to +85 -55 to +125 Units °C °C 7. Electrical Characteristics D.C Characteristics Conditions 25°C No load, Vcc=3.3V No load Vout >=VVOH(MIN.) VIH Hi-Level input voltage Vout =VVOH(MIN.) VIL Low-Level input voltage Vout