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1.     General Description

TC1626 is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped with a 512*16-bit electrical one time programmable memory and 29*8-bit data memory. TC1626 provides flexible interrupt handling capability and eight-level deep stack. An internal oscillator (4MHz or 16MHz) with 3% accuracy is integrated to reduce cost. With internal divider, this oscillator can be adopted to replace expensive crystal in application where time accuracy is not strictly required.

TC1626 is designed to work in the noisy environment, especially to resist electronic fast transient burst (EFT burst). Therefore, it is suitable to be used in application of the home appliance and motor control. Because TC1626 operates in a very low current consumption, it is advantageous in low-power application, like remote control device and battery-powered system.

2.     Features

u     36 powerful instructions to ease coding complexity

u     Except for branches taking place, all instructions need only one cycle

u     Memory configuration:

l     OTP ROM: 512 x 16 bits

l     RAM: 29 x 8 bits

u     14-bit wide instructions

u     8-bit wide data path

u     Interrupt handling

u     Eight-level deep hardware stack

u     Operation speed: DC – 20 MHz clock input

u     Bi-directional IO: Port A, Port B, PY

u     Built-in pull-up: Port B, PY, PA7

u     Wake-up/Interrupt (Port B/PA7/PY)

u     Built-in transistor for IR LED drive: PX (250mA@3V with Vol=1.5V)

u     8-bit real time clock/counter (TMR0) with 8-bit programmable prescaler and overflow interrupt

u     Readable prescaler counter for 16-bit timer capability

u     Power-on Reset (POR)

u     Device Reset Timer (DRT)

u     Oscillator Start-up Timer (OST)

u     Watchdog Timer (WDT) with its own on-chip RC oscillator

u     Configurable WDT wake-up: Reset/Continue

u     Power saving HALT mode

u     Oscillator types:

l     RC4M: Low cost external-RC oscillator

l     LP32K: Low frequency crystal for power saving

l     XT4M: Standard crystal/resonator

l     HS16M: High speed crystal/resonator

l     BR16M: High accuracy 16MHz built-in OSC (± 2%, after calibration)

l     BR4M: High accuracy 4MHz built-in OSC (± 2%, after calibration)

u     Main clock divider (1/2/4/16)

u     EMI configuration bit to reduce 2^nd-order harmonic power of crystal output

u     CMOS OTP technology with fully static design

u     Wide operation voltage and temperature range: 2.2V    to 5.5V, -40 to 85 degree C

u     I/O Driving capability:

VDD=5.0V

Source Current:  -6.0mA (Voh = 4.5v)

Sink Current:  22.0mA (Vol = 0.5v)

 VDD=3.0V

Source Current:  -2.5mA (Voh = 2.7v)

Sink Current:  10.0mA (Vol = 0.3v)

u     Low power consumption: