Holtek Semiconductor HT46C22
The device is an 8-bit high performance RISC-like microcontroller designed for multiple I/O product applications. It is particularly suitable for use in products such as washing machine controllers and home appliances.FEATURES
● Operating voltage:● Up to 0.5ms instruction cycle with 8MHz system clock fSYS=4MHz: 2.2V~5.5V fSYS=8MHz: 4.5V~5.5V
● 19 bidirectional I/O lines (max.)
● 1 interrupt input shared with an I/O line
● 8-bit programmable timer/event counter with over- at VDD=5V
● 6-level subroutine nesting
● 8 channels 9-bit resolution (8-bit accuracy) A/D con- verter
● 1-channel (6+2)/(7+1)-bit PWM output shared with flow interrupt and 7-stage prescaler
● On-chip crystal and RC oscillator
● Watchdog Timer
● 2048´14 program memory ROM
● 64´8 data memory RAM
● Supports PFD for sound generation
● HALT function and wake-up feature reduce power two I/O lines
● 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 package consumption
GENERAL DESCRIPTION
A HALT feature is included to reduce power consumption. I C is a trademark of Philips Semiconductors 2 Rev.