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General Description

The HT46R94 is an 8-bit high performance RISC architecture microcontroller, the device is designed especially for applications that interface directly to analog signals, such as those from sensors. The devices include an integrated multi-channel Analog to Digital Converter in addition to two Pulse Width Modulation outputs. An internal high current LED driver circuit also provides for easy interfacing to applications which contain LED displays.

Features

? Operating voltage:

fSYS=32768Hz: 2.2V~5.5V

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

? 8 bidirectional I/O lines

? Max. 1616 LED driver output

? 8 LED shared I/O lines

? 24 LED shared output

? External dual edge triggered interrupt input shared with I/O line

? Two 8-bit programmable Timer/Event Counters with overflow interrupt

? RC/XTAL and 32768Hz crystal oscillators

? Dual clock system offers three operating modes

- Normal mode: Both RC/XTAL and 32768Hz clock active

- Slow mode: 32768Hz clock only

- Power-down mode can have periodical wake-up using the watchdog timer overflow

? Watchdog Timer

? 409615 program memory

? 1928 data memory

? PFD for audio frequency generation

? Power down and wake-up functions to reduce power consumption

? Up to 0.5s instruction cycle with 8MHz system clock at VDD=5V

? 8-level subroutine nesting

? 8 channel 12-bit resolution A/D converter

? 3 channel 8-bit PWM output shared with I/O lines

? 1/2 bias 4 common LCD

? Bit manipulation instruction

? Table read instructions

? 63 powerful instructions

? All instructions executed in one or two machine cycles

? Low voltage reset function

? 44/52-pin QFP package