HT47C20L Datasheet, PDF (1/55 Pages) Holtek Semiconductor Inc – 8-Bit Microcontroller

HT47C20L
8-Bit Microcontroller
Features
· Operating voltage: 1.2V~2.2V
· 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 32768Hz crystal oscillator
· Watchdog timer
· 2K ´ 16 program memory ROM
· 64 ´ 8 data memory RAM
· One real time clock (RTC)
· One 8-bit prescaler for real time clock
· One buzzer output
· One low voltage detector
General Description
The HT47C20L 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 appli-
· One low voltage reset circuit
· Halt function and wake-up feature reduce
power consumption
· LCD bias C type
· One LCD driver with 20 ´ 2 or 20 ´ 3 or 19 ´ 4
segments
· Two channels RC type A/D converter
· Four-level subroutine nesting
· Bit manipulation instruction
· 16-bit table read instruction
· Up to 122ms instruction cycle with 32768Hz
system clock
· All instructions in one or two machine cycles
· 63 powerful instructions
cations among which are calculators, clock tim-
ers, games, scales, toys, thermometers,
hygrometers, body thermometers, capacitor
scaler, other hand held LCD products, and bat-
tery system in particular.
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January 18, 2000