The HT82B40R and HT82B40A are 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications.

The advantages of low power consumption, I/O flexibility, timer functions, integrated USB interface, Power Down and wake-up functions, Watchdog timer etc, make the devices extremely suitable for use in computer peripheral product applications as well as many other applications such as industrial control, consumer products, subsystem controllers, etc.

The HT82B40A mask version type is fully pin and functionally compatible with the HT82B40R OTP version device.

• Operating voltage:
  f_SYS=6M/12MHz: 3.3V~5.5V
• Low voltage reset function
• 34 bidirectional I/O lines (max.)
• 8-bit programmable timer/event counter with overflow interrupt
• 16-bit programmable timer/event counter with overflow interrupt
• Watchdog Timer
• PS2 and USB modes supported
• USB 2.0 low speed function
• 3 endpoints supported - endpoint 0 included
• 4096x15 program memory
• 160x8 data memory RAM
• Integrated 1.5kW resistor between V33O and D- pins for USB applications
• Fully integrated 6MHz or 12MHz oscillator
• All I/O pins have wake-up functions
• Power-down function and wake-up feature reduce power consumption
• 8-level subroutine nesting
• Up to 0.33us instruction cycle with 12MHz system clock at V_DD=5V
• Bit manipulation instruction
• 15-bit table read instruction
• 63 powerful instructions
• All instructions in one or two machine cycles
• 28/48-pin SSOP, 32-pin QFN and 48-pin LQFP packages