HT47C20 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT47C20' PDF : 56 Pages View PDF
HT47C20
8-Bit R-F Type Mask MCU
Features
· Operating voltage: 2.4V~3.6V
· Eight bidirectional I/O lines
· Four input lines
· One interrupt input
· One 16-bit programmable timer/event counter with
PFD (programmable frequency divider) function
· On-chip crystal and RC oscillator for system clock
· One 32.768kHz crystal oscillator for real time clock
· Watchdog Timer
· 2K´16 program memory ROM
· 64´8 data memory RAM
· One Real Time Clock (RTC)
· One 8-bit prescaler for RTC
· One buzzer output
· HALT function and wake-up feature reduce power
consumption
· LCD bias C type
· One LCD driver with 20 ´ 3 or 19 ´ 4 segments
· One 38kHz or 40kHz IR carrier output
(455kHz or 480kHz system clock only)
· Two channels RC type A/D converter
· Four-level subroutine nesting
· Bit manipulation instruction
· 16-bit table read instruction
· Up to 8.3ms instruction cycle with 480kHz system
clock
· All instructions in one or two machine cycles
· 63 powerful instructions
· 64-pin QFP package
General Description
The HT47C20 is an 8-bit high performance RISC-like
microcontroller. Its single cycle instruction and
two-stage pipeline architecture make high speed appli-
cations. The device is suited for use in multiple LCD low
power applications among which are calculators, clock
timers, games, scales, toys, thermometers, hygrometers,
body thermometers, capacitor scaler, other hand held
LCD products, and battery systems in particular.
Rev. 1.60
1
July 26, 2002
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