HTG1390 Datasheet | Holtek Semiconductor

Features - - - - - - - - HTG1390 4-bit Microcontroller - - - - - - - - Operating voltage: 1.2V~1.8V 7 input lines 3 output lines Halt feature reduces power consumption Up to 16µs instruction cycle with 256k Hz system clock at VDD=1.5V All instructions in 1 or 2 machine cycles 4K×8 program ROM Data memory RAM size 128×4 bits 27×3 segment LCD driver 8-bit table read instruction 5 working registers Internal timer overflow interrupt One level subroutine nesting RC oscillator for system clock 8-bit timer with internal clock source Sound effect circuit General Description The HTG1390 is the processor from Holtek’s 4-bit stand alone single chip microcontroller range specifically designed for LCD product applications. The device is ideally suited for multiple LCD low power applications among which are calculators, scales, and hand held LCD products. 17th Nov ’98 Preliminary Block Diagram Notes: ACC: Accumulator PC: Program counter R0~R4: Working registers PA: Output port...