HT49RA1/HT49CA1
Remote Type 8-Bit MCU with LCD
Technical Document
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Features
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Operating voltage: 2.0V~3.6V
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12 bidirectional I/O lines, 8 input lines,
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8-bit prescaler for RTC
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One carrier output (1/2 or 1/3 duty)
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Software LCD, RTC control
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Watchdog Timer function
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Power down and wake-up functions to reduce
8 segment output, PC0 (input/output)/REM
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Two external interrupt inputs shared with an I/O line
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8-bit programmable Timer/Event Counter with
overflow interrupt function
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Single 16-bit programmable timer/event counter
power consumption
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Up to 1ms instruction cycle with 4MHz system clock
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4-level subroutine nesting
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Bit manipulation instruction
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Table read instructions
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63 powerful instructions
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All instructions executed in one or two machine
with overflow interrupt function
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RC oscillator and 32768Hz crystal oscillator
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LCD driver with 33´2, 33´3 or 32´4 segments
(C type only), 8 logical output option for
SEG12~SEG19 and 4 I/O port option for
SEG0~SEG3 by changing LCDC register
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4096´15 program memory
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160´8 data memory
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Real Time Clock
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RTC
cycles
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Low voltage reset/detector function
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52-pin QFP, 64-pin LQFP packages
General Description
The HT49RA1/HT49CA1 is a Remote Type 8-bit MCU
8-bit high performance RISC architecture
microcontroller. With its internal carrier generator and
LCD Driver functions the device is is especially suitable
for multiple I/O remote control product applications. The
usual Holtek MCU features such as power down and
wake-up functions, oscillator options, etc. combine to
ensure user applications require a minimum of external
components.
The benefits of low power consumption, high perfor-
mance, I/O flexibility and low-cost, provide these de-
vices with the versatility to suit a wide range of
application possibilities such as industrial control, con-
sumer products and particularly suitable for use in prod-
ucts such as infrared LCD remote controllers and
various, subsystem controllers, etc.
Rev. 1.00
1
May 7, 2008
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
