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EM78M611 Dataheets PDF



Part Number EM78M611
Manufacturers Elan Microelectronics
Logo Elan Microelectronics
Description Universal Serial Bus Microcontroller Series
Datasheet EM78M611 DatasheetEM78M611 Datasheet (PDF)

EM78M611 Universal Serial Bus Microcontroller Series Preliminary 1. General Description SPECIFICATION The EM78M611 is a series of Universal Serial Bus 8-bit RISC Multi-Time Programming (MTP) microcontrollers. It is specifically designed for USB low speed device application and to support legacy device such as PS/2 keyboard. The EM78M611 also support one device address and three endpoints. With no firmware involved, these series of microcontrollers can automatically identify and decode Standar.

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EM78M611 Universal Serial Bus Microcontroller Series Preliminary 1. General Description SPECIFICATION The EM78M611 is a series of Universal Serial Bus 8-bit RISC Multi-Time Programming (MTP) microcontrollers. It is specifically designed for USB low speed device application and to support legacy device such as PS/2 keyboard. The EM78M611 also support 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 EM78M611 is implemented on a RISC architecture. It has eight-level stack and eight interrupt sources. Each device has 144 bytes of general purpose SRAM and 6K bytes of program ROM, and is embedded with 4 bytes of E2PROM. The EM78M611 has up to 11 pins with the capacity of sinking large current. These series of chips have many powerful features, including : Dual Clock mode which allows the device to run on very low power saving frequency Pattern Detect Application function which is used in a serial transmission to count waveform width Width Modulation that can generate a duty-cycle-programmable signal 24-channel AD converter with up to 10 bits resolution. 2. Features Operating voltage 4.4V ~ 5.25V 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 Support 1 device address and 3 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 This spec. may change without further notice. 1 06/ 18/ 2003(V1.0) EM78M611 Universal Serial Bus Microcontroller Series Preliminary PS/2 Application Support Auto-detects PS/2 or USB port Build-in PS/2 port interface for keyboard and mouse Built-in 8-bit RISC MCU 8 level stacks for subroutine and interruption Eight available interruptions 8-bit real time clock/counter (TCC) with overflow interruption Built-in RC oscillator free running for WatchDog Timer and Dual clock mode Two independent programmable prescalers for WDT and TCC Two methods of saving power: 1. Power-down mode (SLEEP mode) 2. Dual clock mode. Two clocks per instruction cycle Multi-time programmable I/O Ports Up to 11 LED sink pins Each GPIO pin of Ports 5, 6, 8, P90~P93, P95, and P96; has an internal programmable pull-high resistor (25K Ohm) Each GPIO pin of Port 6, P74~P77, and Port 9 can wakeup the MCU from sleep mode by input state change Internal Memory Built-in 6K*13 bits Program ROM Built-in 144 bytes general purpose registers (SRAM) Built-in USB Application FIFOs. Built-in 4 bytes E2PROM Operation Frequency Normal Mode: MCU runs at the external oscillator frequency; 6MHz or 12MHz Dual Clock Mode: MCU runs at the frequency of 256KHz (or 32KHz, 4KHz, 500Hz), emitted by the interna.


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