General Description

The HT46R23/HT46C23 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 HT46C23 is fully pin and functionally compatible with the OTP version HT46R23 device.

Features

• Operating voltage:

   fSYS=4MHz: 2.2V~5.5V

   fSYS=8MHz: 3.3V~5.5V

• 23 bidirectional I/O lines (max.)

• 1 interrupt input shared with an I/O line

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

• On-chip crystal and RC oscillator

• Watchdog Timer

• 4096 X 15 program memory

• 192 X 8 data memory RAM

• Supports PFD for sound generation

• HALT function and wake-up feature reduce power consumption

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

• 8-level subroutine nesting

• 8 channels 10-bit resolution A/D converter

• 2-channel 8-bit PWM output shared with two I/O lines

• Bit manipulation instruction

• 15-bit table read instruction

• 63 powerful instructions

• All instructions in one or two machine cycles

• Low voltage reset function

• I2C Bus (slave mode)

• 24/28-pin SKDIP/SOP packages