HT48R52/HT48R53
I/O Type 8-Bit MCU
Technical Document
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Features
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Operating voltage:
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External RC and 32768Hz crystal oscillator
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Dual clock system offers three operating modes
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Normal mode: Both RC and 32768Hz clock active
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Slow mode: 32768Hz clock only
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Idle mode: Periodical wake-up by watchdog timer
f
SYS
=4MHz: 2.2V~5.5V
f
SYS
=8MHz: 3.3V~5.5V
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Program memory:
HT48R52: 2k´14
HT48R53: 4k´15
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88´8 data memory
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40 bidirectional I/O lines
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One External interrupt input
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One Internal interrupt
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8 bit programmable timer/event counter
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4-level subroutine nesting
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Watchdog Timer (WDT)
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Buzzer output
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Low voltage reset (LVR)
overflow
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HALT function and wake-up feature reduce power
consumption
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14-bit table read instructions for HT48R52
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15-bit table read instructions for HT48R53
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63 powerful instructions
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One instruction cycle: 4 system clock periods
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All instructions in 1 or 2 instruction cycles
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Bit manipulation instructions
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Up to 0.5ms instruction cycle with 8MHz system clock
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52-pin QFP package
General Description
These devices are 8-bit high performance, RISC archi-
tecture microcontroller specifically designed for multiple
I/O control product applications. The advantages of low
power consumption, I/O flexibility, timer functions, oscil-
lator 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 appli-
cation possibilities such as industrial control, consumer
products, subsystem controllers, etc.
Rev. 1.20
1
December 6, 2005
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
