Holtek Semiconductor HT48R30A-1
The device is an 8-bit high performance RISC-like microcontroller designed for multiple I/O product applications. The device is particularly suitable for use in products such as remote controllers, fan/light controllers, washing machine controllers, scales, toys and various subsystem controllers.FEATURES
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● Operating voltage: fSYS=4MHz: 3.3V~5.5V fSYS=8MHz: 4.5V~5.5V Low voltage reset function 25 bidirectional I/O lines (max.) 1 interrupt input shared with an I/O line 8-bit programmable timer/event counter with overflow interrupt and 8-stage prescaler On-chip RC oscillator, external crystal and RC oscillator 32768Hz crystal oscillator for timing purposes only Watchdog Timer 2048´14 program memory ROM
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● 96´8 data memory RAM Buzzer driving pair and PFD supported HALT function and wake-up feature reduce power consumption 4-level subroutine nesting Up to 0.5ms instruction cycle with 8MHz system clock at VDD=5V Bit manipulation instruction 14-bit table read instruction 63 powerful instructions All instructions in one or two machine cycles 24/28-pin SKDIP/SOP package
GENERAL DESCRIPTION
A HALT feature is included to reduce power consumption. Rev. 1.10 1 July 2, 2001 HT48R30A-1 Block Diagram IN T /P G 0 In te rru p t C ir c u it S T A C K 4 L e v e ls...