HOLTEK

HT49R50A-1
8-Bit LCD Type OTP MCU
 Features
Operating voltage:3.0V~5.5V Buzzer output
8 input lines On-chip crystal, RC and 32768Hz
12 bidirectional I/O lines ---crystal oscillator
Two external interrupt input HALT function and wake-up feature
Two 8-bit programmable timer/event counter with ---reduce power consumption
---PFD (programmable frequency divider) function 6-level subroutine nesting
---LCD driver with 33x3 or 32x4 segments Bit manipulation instruction
4Kx15 program memory EPROM 15-bit table read instruction
160x8 data memory RAM Up to 0.5us instruction cycle with
Real Time Clock (RTC) ---8MHz system clock
8-bit prescaler for RTC 63 powerful instructions
Watchdog Timer All instructions in 1 or 2 machine
48-pin SSOP, 100-pin QFP package ---cycles
 General Description
The HT49R50A-1 is an 8-bit high performance single chip microcontroller. Its single cycle
instruction and two-stage pipeline architecture make it suitable for high speed applications. The
device is suited for use in multiple LCD low power applications among which are calculators,
clock timers, games, scales, leisure products, other hand held LCD products, and battery system in particular.