HT49R30 Datasheet | Holtek Semiconductor

HT49R50 8-Bit Microcontroller Features - - - - - - - - - - Operating voltage: - 2MHz: 3.0V~5.2V - 2MHz~4MHz: 4.5V~5.5V 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 33´3 or 32´4 segments 4K´15 program memory EPROM 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...