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EM78M611 데이터시트 PDF




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부품번호 EM78M611 기능
기능 Universal Serial Bus Microcontroller Series
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EM78M611 데이터시트, 핀배열, 회로
EM78M611
Universal Serial Bus Microcontroller Series
Preliminary
SPECIFICATION
1. General Description
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 pdf, 반도체, 판매, 대치품
4. Applications
EM78M611
Universal Serial Bus Microcontroller Series
Preliminary
USB Keyboard only.
USB and PS/2 both compatible with Keyboard.
USB Keyboard with USB Mouse.
USB Joystick.
This spec. may change without further notice.
4
06/ 18/ 2003(V1.0)

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EM78M611 전자부품, 판매, 대치품
EM78M611
Universal Serial Bus Microcontroller Series
Preliminary
6. Pin Description
Pin Number
P50 ~ P57
P60 ~ P67
P80 ~ P87
AD0 ~ AD23
P90 ~ P93
P95 ~ P96
PWM1 ~ PWM2
SE1 ~ SE2
P70 ~ P72, P76,
P77
D+ / CLK / P74
D- / DATA / P75
OSCI
OSCO
VDD
GND
VNN
P94/VPP
V3.3
I/O Function
I/O
GPIO pins. These pins can be pulled-high internally through software
control.
I Analog to Digital Converter input pins.
GPIO pins. These pins can be pulled-high internally through software
I/O control or LED sink pins.
O
I
I/O
I/O
I/O
I
O
PWR
PWR
I
I
PWR
PWM output pins
Serial Signal input pins.
LED sink pins.
P76, P77 will have an internal pulled-high resistor when the
EM78M611 is running under PS/2 mode.
USB plus data line interface or CLK for PS/2 keyboard.
When the EM78M611 is running under PS/2 mode, this pin will have
an internal pulled-high resistor (2.2K Ohm), with VDD=5.0V.
USB minus data line interface or DATA for PS/2 keyboard.
When the EM78M611 is running under PS/2 mode, this pin will have
an internal pulled-high resistor (2.2K Ohm), with VDD=5.0V.
When the EM78M611 is running under USB mode, this pin will have
an internal pulled-high resistor, 1.5k Ohm, with V3.3=3.3V.
6MHz / 12MHz ceramic resonator or crystal input.
Return path for 6-MHz / 12MHz ceramic resonator or crystal.
Power supply pin.
Ground pin.
MTP program Pin
Input only I/O. MTP program pin.
3.3v regulator output.
This spec. may change without further notice.
7
06/ 18/ 2003(V1.0)

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