HT46R74D-1 Holtek Semiconductor, HT46R74D-1 Datasheet

HT46R74D-1

Manufacturer Part Number

HT46R74D-1

Description

Dual Slope A/D Type MCU

Manufacturer

Holtek Semiconductor

Datasheet

1.HT46R74D-1.pdf (48 pages)

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Technical Document

Features

General Description

The HT46R74D-1 is an 8-bit high performance, RISC

architecture microcontroller device specifically de-

signed for A/D with LCD applications that interface di-

rectly to analog signals, such as those from sensors.

The advantages of low power consumption, I/O flexibil-

ity, timer functions, oscillator options, Dual slope A/D

Rev. 1.10

Tools Information

FAQs

Application Note

Operating voltage:

10 bidirectional I/O lines and two ADC inputs

Two external interrupts inputs shared with I/O lines

One 8-bit and one 18-bit programmable timer/event

counter with overflow interrupt and pre-scaler

LCD driver with 15 4, 16 3 or 16 2 segments

4K 15 program memory with partial lock function

96 8 data memory RAM

Single differential input channel dual slope Analog to

Digital Converter with Operational Amplifier.

Watchdog Timer with regulator power

Buzzer output

External 32768Hz RTC oscillator

SYS

= 4MHz: 2.2V~5.5V

= 8MHz: 3.3V~5.5V

Dual Slope A/D Type 8-Bit OTP MCU

converter, LCD display, HALT and wake-up functions,

watchdog timer, as well as low cost, enhance the versa-

tility of these devices to suit for a wide range of AD with

LCD application possibilities such as sensor signal pro-

cessing, scales, consumer products, subsystem con-

trollers, etc.

Integrated RC or crystal oscillator

Power-down and wake-up functions reduce power

consumption

Internal 3.3V Voltage regulator and charge pump

Embedded voltage reference generator - 1.5V

6-level subroutine nesting

Bit manipulation instruction

15-bit table read instruction

Up to 0.5 s instruction cycle with 8MHz system clock

at V

63 powerful instructions

All instructions in 1 or 2 machine cycles

Low voltage reset/detector function

56-pin SSOP package

=5V

HT46R74D-1

January 11, 2007

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