General Description

The HT46R23/HT46C23 are 8-bit, high performance, RISC architecture microcontroller devices specifically designed for A/D applications that interface directly to analog signals, such as those from sensors. The mask version HT46C23 is fully pin and functionally compatible with the OTP version HT46R23 device.

Features

? Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

? 23 bidirectional I/O lines (max.)

? 1 interrupt input shared with an I/O line

? 16-bit programmable timer/event counter with overflow interrupt and 7-stage prescaler

? On-chip crystal and RC oscillator

? Watchdog Timer

? 4096 X 15 program memory

? 192 X 8 data memory RAM

? Supports PFD for sound generation

? HALT function and wake-up feature reduce power consumption

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

? 8-level subroutine nesting

? 8 channels 10-bit resolution A/D converter

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

? Bit manipulation instruction

? 15-bit table read instruction

? 63 powerful instructions

? All instructions in one or two machine cycles

? Low voltage reset function

? I2C Bus (slave mode)

? 24/28-pin SKDIP/SOP packages