HT1130 4-bit Microcontroller
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 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 .
4-bit Microcontroller
HT1130 4-bit Microcontroller
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 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.