HT49C50 Datasheet, PDF (1/52 Pages) Holtek Semiconductor Inc – 8-Bit Microcontroller

HT49C50
8-Bit Microcontroller
Features
· Operating voltage: 2.2V~5.2V
· 8 input lines
· 12 bidirectional I/O lines
· Two external interrupt input
· Two 8-bit programmable timer/event
counter with PFD (programmable fre-
quency divider) function
· LCD driver with 33 ´ 3 or 32 ´ 4 segments
· 4K ´ 15 program memory ROM
· 160 ´ 8 data memory RAM
· Real Time Clock (RTC)
· 8-bit prescaler for RTC
· Watchdog timer
· Buzzer output
· On-chip crystal and RC oscillator
· Halt function and wake-up feature reduce
power consumption
· 6-level subroutine nesting
· Bit manipulation instruction
· 15-bit table read instruction
· Up to 1ms instruction cycle with 4MHz
system clock
· 63 powerful instructions
· All instructions in 1 or 2 machine cycles
· 80/100-pin QFP package
General Description
The HT49C50 is an 8-bit high performance single
chip microcontroller. Its single cycle instruction
and two-stage pipeline architecture make it suit-
able for high speed applications. The device is
suited for use in multiple LCD low power applica-
tions among which are calculators, clock timers,
games, scales, leisure products, other hand held
LCD products, and battery system in particular.
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August 18, 1999