HT46RU22
A/D Type 8-Bit MCU
Technical Document
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Features
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Operating voltage:
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Up to 0.5ms instruction cycle with 8MHz system clock
f
SYS
=4MHz: 2.2V~5.5V
f
SYS
=8MHz: 3.3V~5.5V
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19 bidirectional I/O lines (max.)
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1 interrupt input shared with an I/O line
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8-bit programmable timer/event counter with
at V
DD
=5V
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6-level subroutine nesting
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8 channels 9-bit resolution A/D converter
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1-channel 8-bit PWM output shared with one I/O line
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Universal Asynchronous Receiver Transmitter
overflow interrupt and 7-stage prescaler
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On-chip crystal and RC oscillator
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Watchdog Timer
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2048´14 program memory
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64´8 data memory RAM
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Supports PFD for sound generation
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HALT function and wake-up feature reduce power
(UART)
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Bit manipulation instruction
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14-bit table read instruction
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63 powerful instructions
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All instructions in one or two machine cycles
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Low voltage reset function
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I
2
C Bus (slave mode)
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24-pin SKDIP/SOP/SSOP package
consumption
General Description
The HT46RU22 are 8-bit, high performance, RISC ar-
chitecture microcontroller devices specifically designed
for A/D applications that interface directly to analog sig-
nals, such as those from sensors.
The advantages of low power consumption, I/O flexibil-
ity, programmable frequency divider, timer functions,
oscillator options, multi-channel A/D Converter, Pulse
Width Modulation function, UART function, I
2
C inter-
face, HALT and wake-up functions, enhance the versa-
tility of these devices to suit a wide range of A/D
application possibilities such as sensor signal process-
ing, motor driving, industrial control, consumer prod-
ucts, subsystem controllers, etc.
I
2
C is a trademark of Philips Semiconductors
Rev. 1.20
1
March 23, 2007
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
