HT46RU22 -- A/D Type 8-Bit MCU

General Description
The HT46RU22 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 advantages of low power consumption, I/O flexibility, programmable frequency divider, timer functions, oscillator options, multi-channel A/D Converter, Pulse Width Modulation function, UART function, I2C interface, HALT and wake-up functions, enhance the versatility of these devices to suit a wide range of A/D application possibilities such as sensor signal processing, motor driving, industrial control, consumer products, subsystem controllers, etc.

Features
Operating voltage:
fSYS=4MHz: 2.2V~5.5V
fSYS=8MHz: 3.3V~5.5V
19 bidirectional I/O lines (max.)
1 interrupt input shared with an I/O line
8-bit programmable timer/event counter with overflow interrupt and 7-stage prescaler
On-chip crystal and RC oscillator
Watchdog Timer
2048x14 program memory
64x8 data memory RAM
Supports PFD for sound generation
HALT function and wake-up feature reduce power consumption 
Up to 0.5us instruction cycle with 8MHz system clock at VDD=5V
6-level subroutine nesting
8 channels 9-bit resolution A/D converter
1-channel 8-bit PWM output shared with one I/O line
Universal Asynchronous Receiver Transmitter (UART)
Bit manipulation instruction
14-bit table read instruction
63 powerful instructions
All instructions in one or two machine cycles
Low voltage reset function
I2C Bus (slave mode)
24-pin SKDIP/SOP/SSOP package