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General Description

The HT49R50A-1/HT49C50-1/HT49C50L are 8-bit, high performance, RISC architecture microcontroller devices specifically designed for a wide range of LCD applications. The mask version HT49C50-1 and HT49C50L are fully pin and functionally compatible with the OTP version HT49R50A-1 device. The HT49C50L is a low voltage version, with the ability to operate at a minimum power supply of 1.2V, making it suitable for single cell battery applications.

Features

? Operating voltage:

fSYS=4MHz: 2.2V~5.5V for HT49R50A-1/HT49C50-1

fSYS=8MHz: 3.3V~5.5V for HT49R50A-1/HT49C50-1

fSYS=500kHz: 1.2V~2.2V for HT49C50L

? 8 input lines

? 12 bidirectional I/O lines

? Two external interrupt input

? Two 8-bit programmable timer/event counter with PFD (programmable frequency divider) function

? LCD driver with 33x2, 33x3 or 32x4 segments

? 4Kx15 program memory

? 160x8 data memory RAM

? Real Time Clock (RTC)

? 8-bit prescaler for RTC

? Watchdog Timer

? Buzzer output

? On-chip crystal, RC and 32768Hz crystal oscillator

? HALT function and wake-up feature reduce power consumption

? 6-level subroutine nesting

? Bit manipulation instruction

? 15-bit table read instruction

? Up to 0.5μs instruction cycle with 8MHz system clock for HT49R50A-1/HT49C50-1

? Up to 8μs instruction cycle with 500kHz system clock for HT49C50L

? 63 powerful instructions

? All instructions in 1 or 2 machine cycles

? Low voltage reset/detector function for HT49R50A-1/HT49C50-1

? 48-pin SSOP, 64-pin LQFP and 100-pin LQFP packages