General Description

The HT46R22/HT46C22 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 HT46C22 is fully pin and functionally compatible with the OTP version HT46R22 device.

Features

Operating voltage:

   f_SYS=4MHz: 2.2V~5.5V

   f_SYS=8MHz: 3.3V~5.5V

19 bidirectional I/O lines (max.)

1 interrupt input shared with an I/O line

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

On-chip crystal and RC oscillator

Watchdog Timer

204814 program memory

648 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

6-level subroutine nesting

8 channels 9-bit resolution (8-bit accuracy) A/D converter

1-channel (6+2)/(7+1)-bit PWM output shared with one I/O line

Bit manipulation instruction

14-bit table read instruction

63 powerful instructions

All instructions in one or two machine cycles

Low voltage reset function

I2C Bus (slave mode)

24-pin SKDIP/SOP package