General Description

The HT46R24/HT46C24 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 HT46C24 is fully pin and functionally compatible with the OTP version HT46R24 device.

Features

• Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

• 40 bidirectional I/O lines (max.)

• 1 interrupt input shared with an I/O line

• Two 16-bit programmable timer/event counter with overflow interrupt

• On-chip crystal and RC oscillator

• Watchdog Timer

• 819216 program memory

• 3848 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

• 16-level subroutine nesting

• 8 channels 10-bit resolution A/D converter

• 4-channel 8-bit PWM output shared with four I/O lines

• Bit manipulation instruction

• 16-bit table read instruction

• 63 powerful instructions

• All instructions in one or two machine cycles

• Low voltage reset function

• I2C Bus (slave mode)

• 28-pin SKDIP/SOP, 48-pin SSOP package