General Description
The HT48R01/HT48R02/HT48R03 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for I/O control. The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, Power-down and wake-up functions, Watchdog Timer, buzzer driver, as well as low cost, enhance the versatility of these devices to suit a wide range of application possibilities such as industrial control, consumer products, subsystem controllers, etc.

FEATUREs
Operating voltage:
   fSYS=4MHz: 2.2V~5.5V
   fSYS=8MHz: 3.3V~5.5V
   fSYS=12MHz: 4.5V~5.5V
7 bidirectional I/O lines and 1 input
Interrupt input shared with I/O line
4 oscillator configuration options
   -External crystal OSC
   -External RC OSC
   -Internal RC+I/O (PA5, PA6)
   -Internal RC+RTC OSC (32768Hz)
Internal RC oscillator
   -3 frequency selections: 4MHz/8MHz/12MHz
   -4MHz with 10% variation (2.2V~5.5V, 25C)
   -8MHz with 10% variation (3.3V~5.5V, 25C)
   -12MHz with 10% variation (4.5V~5.5V, 25C)
Watchdog Timer
Program memory ROM: Up to 4096
15
Data memory RAM: Up to 160
8
Buzzer driving pair and PFD supported
Power-down and wake-up functions reduce power consumption
Up to 0.5s instruction cycle with 8MHz system clock at VDD=5V
All instructions executed within one or two machine cycles
14-bit or 15-bit table read instruction
Up to 8-levels of subroutine nesting
Bit manipulation instruction
Low voltage reset function
10-pin MSOP package