EM78P611G中文资料USB MCU数据手册Elan规格书

描述 Description

The EM78P611G is a series of 8-bit Universal Serial Bus RISC architecture, One-Time Programmable (OTP) microcontrollers. 
It is specifically designed for USB low speed device application and supports standard devices such as PS/2 keyboard. 
The EM78P611G also supports one device address and three endpoints.With no firmware involved, these series of microcontrollers can automatically identify and decode Standard USB Command to Endpoint Zero.
The EM78P611G has 8-level stacks and 6 interrupt sources.It has 144 bytes of general purpose SRAM, 6K words of OTP ROM.
The EM78P611G can run with either an external ceramic resonator with a6 or 12 MHz or internal high frequency oscillator (IRC) by setting Code Option11.

特性 Features

Operating voltage: 4.0V ~ 5.5V  
All GPIO are 5V  
Low-cost solution for low-speed USB devices, such as keyboard, joystick, and Gamepad 
USB Specification Compliance 
* Universal Serial Bus Specification Version 1.1
* USB Device Class Definition for Human Interface Device (HID), Firmware Specification Version 1.1
* Supports one device address and three endpoints
USB Application
* P75 (D-) has an internal pull-high resistor (1.5K Ohm) 
* USB protocol handling 
* USB device state handling 
* Identifying and decoding of Standard USB commands to EndPoint Zero
PS/2 Application Support 
* Built-in PS/2 port interface for keyboard and mouse 
Built-in 8-bit RISC MCU 
* 8-level stacks for subroutine nesting and interrupt 
* 8-bit real time clock/counter (TCC) with overflow interrupt
* Six available interrupts
* Built-in RC oscillator free running for Watchdog Timer and Dual clock mode
* Two independent programmable prescalers for WDT and TCC 
* Two power saving methods:
   - Power-down mode (SLEEP mode)
   - Dual clock mode.
* Two clocks per instruction cycle 
* One-time programmable (OTP)
I/O Ports 
* Up to 12 LED sink pins 
* Each GPIO pin of Ports 5, 6, 8, P90~P93, P95~97, has an internal programmable pull-high resistor(25K Ohm)
* Each GPIO pin of Port 6, P74 ~ P77 and Port 9 can wake up the MCU from sleep mode by input state change
Internal Memory
* Built-in 6K x 13 bits Program ROM
* Built-in 144 bytes general purpose registers (SRAM)
* Built-in USB Application FIFOs
Operation Frequency
* Normal Mode: MCU runs at the external oscillator frequency of 6MHz or 12MHz or internal high frequency oscillator (IRC)
* Dual Clock Mode: MCU runs at a frequency of 256kHz (or 32kHz, 4kHz, 500Hz), emittedby the internal oscillator with the external  ceramic resonator turned off tosave power. Built-in Pulse Width Modulation (PWM)
* Up to 2 channels PWM function on P92 (PWM1) and P93 (PWM2)
* Up to 8-bit resolution PWM output
* Up to 8 selections of duty cycles
Built-in 3.3V Voltage Regulator
* For MCU power supply
* Pull-up source for the external USB resistor on D-pin.
Package Type:
* 40-pin PDIP (600 mil)                   EM78P611GAP
* 44-pin QFP                                  EM78P611GAQ

应用 Application

USB Keyboard only  
USB and PS/2 both compatible with Keyboard  
USB Keyboard with USB Mouse 
USB Joystick