HT82D20R/HT82D20A -- 27MHz One Channel RX 8-Bit MCU (EOL)

General Description

USB Encoder Built-in one 27MHz FSK receiver MCU OTP body is suitable for USB interface and 27MHz Wireless system. Flexible total solution for applications that combine PS/2 and low-speed USB interface and 27MHz wireless system, such as mice, joysticks, and many others.

It consists of a Holtek high performance 8-bit MCU core for control unit, built-in USB SIE, 27MHz FSK Receiver , 2Kx14 bits ROM and 96 bytes data RAM.

Features

  • USB specification compliance
    -- Conforms to USB specification V2.0
    -- Conforms to USB HID specification V1.11
  • Supports 1 Low-speed USB control endpoint and 1 interrupt endpoint
  • Each endpoint has 8 byte FIFO
  • Integrated USB transceiver
  • 3.3V regulator output
  • Built-in one 27MHz FSK receiver
  • PS2 and USB modes supported
  • 27MHz FSK receiver power down function
  • FSK receiver frequency range 26.945~27.295MHz
  • FSK receiver high sensitivity: < -90 dBm
  • RF tuner, mixer, transistors, passives, coils, and
    SAW filter functions integrated in the same device
  • Integrated FSK receiver phase locked loop
  • Eight user selectable frequencies
  • Integrated FSK Receiver 6Kbps data rate
  • Uses external 12MHz crystal
  • 8-bit RISC microcontroller, with 2Kx14 bits EPROM (000H~7FFH)
    96 bytes RAM (20H~7FH)
  • 6MHz internal MCU clock
  • 4-level stack
  • Two 7-bit indirect addressing registers
  • One 16-bit programmable timer counter with
    overflow interrupt (shared with PA7, vector 0CH)
  • One USB interrupt input (vector 04H)
  • HALT function and wake-up feature reduce power consumption
  • PA0~PA7 support wake-up function
  • Internal power-on reset (POR)
  • Watchdog Timer (WDT)
  • 8 I/O ports
  • 28-pin SSOP package

Technical Document

Other Information