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HT1130 - 4-bit Microcontroller

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General Description

The HT1130 is a 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 · Internal timer overflow interrupt · External interrupt · One level subroutine nesting · 8-bit timer with internal or external clock source · 8-bit table read instruction · Up to 4ms instruction cycle with 1MHz sys- tem clock at VDD=3V · All instructions in 1 or 2 machine cycles LCD low power applications among which are calculators, scales and hand-held LCD products.

1 May 24, 1999 Block Diagram O SCI O SCO IN T RES TEST1 TEST2 T1D T256 V LC D VDD VSS C o n tro l and T im in g C ir c u it S ta c k PC A LU ACC ROM In s tr u c tio n D ecoder R0 R1 R2 R3 R4 T e m p o ra ry D a ta R A M D is p la y D a ta R A M L C D D r iv e r HT1130 T im e r PA PP PS PM S ound E ffe c t TM C LK PA0 PA1 PA2 PA3 PP0 PP1 PP2 PP3 PS0 PS1 PS2 PS3 PM 0 PM 1 PM 2 PM 3 BZ BZ COM 3 COM 2 COM 1 COM 0 S E G 31 S E G 30 SEG 1 SEG 0 Notes: ACC: Accumulator PC: Program counter R0~R4: Working registers PA: Output port PS,PM,PP: Input ports 2 May 24, 1999 Pad Assignment HT1130 S E G 18 S E G 19 S E G 20 S E G 21 S E G 22 S E G 23 S E G 24 S E G 25 S E G 26 S E G 27 S E G 28 S E G 29 S E G 30 S E G 31 VDD BZ BZ V LC D T256 COM 3 COM 2 COM 1 COM 0 TEST1 TEST2 PM 3 PM 2 PM 1 PM 0 PS3 PS2 PS1 PS0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 6 6 6 5 6 4 6 3 6 2 6 1 6 0 5 9 5 8 5 7 5 6 5 5 5 4 5 3 55 12 .

Overview

HT1130 4-bit Microcontroller.

Key Features

  • Operating voltage: 2.4V~3.3V.
  • 12 input lines.
  • Four output lines.
  • Five working registers.
  • Sound effect circuit.
  • 4K ´ 8 program ROM.
  • 128 ´ 4 bits data memory RAM size.
  • 32 ´ 4 segment LCD driver.
  • RC oscillator for system clock.
  • Halt feature reduces power consumption General.

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