UPD6708 Datasheet, PDF (1/72 Pages) NEC – IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI

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