HT47R20A-1/HT47C20-1
R-F Type 8-Bit MCU
Technical Document
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Tools Information
FAQs
Application Note
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HA0029E Using the Time Base Function in the HT47R20A-1
HA0030E Using the RTC in the HT47R20A-1
HA0034E Using the Buzzer Function in the HT47R20A-1
HA0036E Using the PFD Function in the HT47R20A-1
HA0045E Distinguishing between the Different Devices in the HT47 MCU Series
Features
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Operating voltage: 2.2V~5.5V
Eight bidirectional I/O lines
Four input lines
One low voltage reset circuit
One buzzer output
HALT function and wake-up feature reduce power
consumption
One interrupt input
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LCD bias C type or R type
One 16-bit programmable timer/event counter with
PFD (programmable frequency divider) function
OneLCDdriverwith20´2, 20´3or19´4segments
One IR carrier output
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On-chip crystal and RC oscillator for system clock
One 32.768kHz crystal oscillator for real time clock or
system clock
Two channels RC type A/D converter
Four-level subroutine nesting
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Watchdog Timer
Bit manipulation instruction
2K´16 program memory
64´8 data memory RAM
One Real Time Clock (RTC)
One 8-bit prescaler for RTC
One low voltage detector
16-bit table read instruction
Up to 1ms instruction cycle with 4MHz system clock
Allinstructionsinoneortwomachinecycles
63 powerful instructions
64-pin LQFP package
General Description
The HT47R20A-1/HT47C20-1 are 8-bit, high perfor-
mance, RISC architecture microcontroller devices spe-
cifically designed for applications that interface directly
to analog signals, such as those from sensors. The
mask version HT47C20-1 is fully pin and functionally
compatible with the OTP version HT47R20A-1 device.
The advantages of low power consumption, I/O flexibil-
ity, programmable frequency divider, timer functions,
oscillator options, 2-channel RC type A/D Converter,
LCD driver, HALT and wake-up functions, enhance the
versatility of these devices to suit a wide range of Resis-
tor to Frequency application possibilities such as sensor
signal processing, remote metering, industrial control,
consumer products, subsystem controllers, etc.
Rev. 1.80
1
June 23, 2008