HT47C20 Datasheet, PDF (1/56 Pages) Holtek Semiconductor Inc – 8-Bit Microcontroller

HT47C20
8-Bit Microcontroller
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
General Description
The HT47C20 is an 8-bit high performance
RISC-like microcontroller. Its single cycle in-
struction and two-stage pipeline architecture
make high speed applications. The device is
suited for use in multiple LCD low power
· 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
applications among which are calculators, clock
timers, games, scales, toys, thermometers, hy-
grometers, body thermometers, capacitor scaler,
other hand held LCD products, and battery sys-
tems in particular.
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January 18, 2000