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General Description

The HT48R50A-1/HT48C50-1 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications. The mask version HT48C50-1 is fully pin and functionally compatible with the OTP version HT48R50A-1 device.

The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, HALT and wake-up functions, watchdog timer, buzzer driver, as well as low cost, enhance the versatility of these devices to suit a wide range of application possibilities such as industrial control, consumer products, subsystem controllers, etc.

Features

● Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

● Low voltage reset function

● 35 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

● 16-bit programmable timer/event counter and over

flow interrupts

● On-chip RC oscillator, external crystal and RC oscillator

● 32768Hz crystal oscillator for timing purposes only

● Watchdog Timer

● 409615 program memory ROM

● 1608 data memory RAM

● Buzzer driving pair and PFD supported

● HALT function and wake-up feature reduce power

consumption

● 6-level subroutine nesting

● Up to 0.5μs instruction cycle with 8MHz system clock

at VDD=5V

● Bit manipulation instruction

● 15-bit table read instruction

● 63 powerful instructions

● All instructions in one or two machine cycles

● 28-pin SKDIP/SOP, 48-pin SSOP package