General Description

The HT46R53/HT46R54 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:

   2K x 14 OTP (HT46R53)

   4K x 15 OTP (HT46R54)

 Data memory: 88 x 8 RAM

 A/D converter: 12bits x 8Ch

   External A/D converter reference voltage input pin

 22 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 0.5us 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

 28-pin SKDIP/SOP package