General Description

The HT46R232/HT46C232 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 HT46C232 is fully pin and functionally compatible with the OTP version HT46R232 device.

Features

Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

40 bidirectional I/O lines (max.)

1 interrupt input shared with an I/O line

Two 16-bit programmable timer/event counter with overflow interrupt

On-chip crystal and RC oscillator

Watchdog Timer

409616 program memory

1928 data memory RAM

Supports PFD for sound generation

HALT function and wake-up feature reduce power consumption

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

8-level subroutine nesting

8 channels 10-bit resolution A/D converter

4-channel 8-bit PWM output shared with four I/O lines

Bit manipulation instruction

16-bit table read instruction

63 powerful instructions

All instructions in one or two machine cycles

Low voltage reset function

I2C Bus (slave mode)

28-pin SKDIP/SOP, 48-pin SSOP packages