General Description

The HT46R51/HT46R52 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 advan

tages of low power consumption, I/O flexibility, timer functions, oscillator options, multi-channel A/D converter, Pulse Width Modulation function, HALT and wake-up functions, watchdog timer, as well as low cost, enhance the versatility of these devices to suit a wide range of A/D application possibilities such as sensor signal processing, chargers, motor driving, industrial control, consumer products, subsystem controllers, etc.

Features

Low-power fully static CMOS design

Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

Program Memory:

1K14 OTP (HT46R51)

2K14 OTP (HT46R52)

Data memory: 888 RAM

A/D converter: 12bits x 5Ch

External A/D converter reference voltage input pin

14 bidirectional I/O lines

1 interrupt input shared with an I/O line

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

On-chip crystal and RC oscillator

6-level subroutine nesting

Watchdog Timer

Low voltage reset function

HALT function

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

1-channel 8-bit PWM output shared with an I/O line

PFD function

Bit manipulation instruction

Table read instruction

63 powerful instructions

All instructions in one or two machine cycles

18-pin DIP, 20-pin SOP/SSOP package