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UPD6708CX の電気的特性と機能

UPD6708CXのメーカーはNECです、この部品の機能は「IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI」です。


製品の詳細 ( Datasheet PDF )

部品番号 UPD6708CX
部品説明 IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI
メーカ NEC
ロゴ NEC ロゴ 




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UPD6708CX Datasheet, UPD6708CX PDF,ピン配置, 機能
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD6708
IEBus(Inter Equipment Bus) PROTOCOL CONTROL LSI
DESCRIPTION
The µPD6708 is a peripheral LSI for microcontrollers that controls the protocol of the IEBus.
This LSI processes the protocol of the IEBus. Because it is provided with a transmit/receive buffer, the microcontroller
can concentrate on the application processing of the IEBus. Because the µPD6708 also contains an IEBus driver/receiver,
it can be directly connected to the bus.
FEATURES
Protocol control of IEBus
• Multi-master system
• Broadcast communication function (commu-
nication between one unit and multiple units)
• Choice of three modes with different trans-
mission speeds
Mode 0
Mode 1
Mode 2
At 12 MHz
Approx. 3.9 Kbps
Approx. 17 Kbps
Approx. 26 Kbps
At 12.58 MHz
Approx. 4.1 Kbps
Approx. 18 Kbps
Approx. 27 Kbps
On-chip IEBus driver/receiver
Transmit/receive buffer
Transmit: 4-byte FIFO
Receive: 20-byte FIFO
Interface with microcontroller
• Three-line serial I/O (SCK, SO, SI pins)
• Transfer with MSB first
Oscillation frequency (fX): 12 MHz, 12.58 MHz
• In modes 0 and 1: ±1.5 %
• In mode 2:
±0.5 %
Supply voltage: VDD = 5 V ±10 %
ORDERING INFORMATION
Part Number
Package
µPD6708CX
µPD6708GS
16-pin plastic DIP (300 mil)
16-pin plastic SOP (300 mil)
APPLICATION FIELD
Fields where a small-scale digital data transfer system is required between equipment, such as automobile electronic
systems and industrial equipment
The information in this document is subject to change without notice.
Document No. U10680EJ2V0DS00 (2nd edition)
(Previous No. IC-3282)
Date Published January 1996 P
Printed in Japan
The mark 5 shows major revised points.
© 1993

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UPD6708CX pdf, ピン配列
µPD6708
CONTENTS
1. PIN FUNCTIONS ......................................................................................................................................... 5
1.1 List of Pin Functions ......................................................................................................................................... 5
2. IEBus OPERATION .................................................................................................................................... 6
2.1 Operation Overview ........................................................................................................................................... 6
2.2 IEBus Communication Protocol ...................................................................................................................... 7
2.2.1 Bus mastership determination (arbitration) ................................................................................... 8
2.2.2 Communication modes ...................................................................................................................... 8
2.2.3 Communication address ................................................................................................................... 9
2.2.4 Broadcast communication ................................................................................................................ 9
2.3 Transfer Protocol ............................................................................................................................................. 10
2.4 Transfer Data (Contents of Data Field) ......................................................................................................... 16
2.5 Bit Format ......................................................................................................................................................... 19
3. INTERNAL CONFIGURATION ................................................................................................................. 20
3.1 Data Link Layer Controller ............................................................................................................................. 21
3.2 Physical Layer Controller ............................................................................................................................... 21
3.3 IEBus Driver/Receiver ..................................................................................................................................... 21
3.4 Host Interface ................................................................................................................................................... 21
4. INTERFACING WITH HOST CONTROLLER .......................................................................................... 22
4.1 Accessible Buffers and Registers from Host Controller ........................................................................... 22
4.1.1 Write data buffer (WDB) .................................................................................................................. 22
4.1.2 Read data buffer (RDB) ................................................................................................................... 22
4.1.3 Command register (CMR) ................................................................................................................ 22
4.1.4 Status register (STR) ....................................................................................................................... 23
4.2 Host Interface Modes ...................................................................................................................................... 23
4.2.1 Switching through pin control ....................................................................................................... 24
4.2.2 Switching through software control .............................................................................................. 26
4.3 Reset Mode ....................................................................................................................................................... 28
5. COMMUNICATION CONTROL COMMANDS ......................................................................................... 30
5.1 Overview of Communication Control Commands....................................................................................... 30
5.2 Communication Control Command Functions ............................................................................................ 31
5.2.1 INIT command (command code: 0000).......................................................................................... 31
5.2.2 SETSA command (command code: 0001) .................................................................................... 32
5.2.3 MREQ1 command (command code: 0010) ................................................................................... 33
5.2.4 MREQ2 command (command code: 0011) ................................................................................... 34
5.2.5 ABORT command (command code: 0100) ................................................................................... 34
5.2.6 SETSD command (command code: 0101) .................................................................................... 35
5.2.7 GETSTA command (command code: 0110) .................................................................................. 36
5.2.8 SETREV command (command code: 0111) .................................................................................. 37
6. RETURN CODES ...................................................................................................................................... 38
6.1 Return Codes in Master/Slave Data Transmission ..................................................................................... 38
6.2 Return Codes in Master Reception ............................................................................................................... 38
6.3 Return Codes in Slave Reception ................................................................................................................. 39
6.4 Return Codes in Broadcast Reception ......................................................................................................... 39
6.5 Return Codes Generation Intervals ............................................................................................................... 40
7. COMMUNICATING WITH HOST CONTROLLER ................................................................................... 43
7.1 Master Transmission ....................................................................................................................................... 43
7.1.1 Master transmission by MREQ1 command .................................................................................. 43
7.1.2 Master transmission by MREQ2 command .................................................................................. 44
3


3Pages


UPD6708CX 電子部品, 半導体
µPD6708
2. IEBus OPERATION
2.1 Operation Overview
5 The µPD6708 is an IEBus interface CMOS LSI device.
The IEBus is a bus for a small-scale digital data transfer system designed to transfer data between electronic devices.
The µPD6708 is connected to a microcontroller incorporated in electronic equipment with a serial interface (SCK, SO,
SI pins). The data and commands required to transfer data with the host controller (microcontroller) are set via this serial
interface.
When the host controller transmits data to the µPD6708 via the serial interface, signals are output from the BUS pins
(BUS+ and BUS–). Data received from the BUS pins can be read by the host controller via the serial interface.
6

6 Page



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部品番号部品説明メーカ
UPD6708CX

IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI

NEC
NEC


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