Communication Between The Fg2 And Mtrc; Communication - NEC V850ES/DJ2 User Manual

1.5 Communication Between the FG2 and MTRC

The clocked synchronous serial interface CSIB1 of the FG2 device is used for the communication with
the MTRC.
The communication I/F of the MTRC is fixed to the following settings:
• I/F:
• Mode:
• Data length:
length)
• Transfer:
• Transmission:

1.5.1 Communication

The software for the communication between the FG2 device and the MTRC has to manage the I/F of
the CSIB1 and the PCM0 pin as chip select signal.
The CSI1B of the FG2 device has been set to master mode, because the MTRC CSI is always in slave
mode. Therefore it is necessary, that the CSIB1 sends dummy data if the FG2 device wants to read
data from the MTRC.
The MTRC CSI is always in 8-bit mode but is capable of continuous data transfer. Therefore the 16-bit
mode of the CSIB1 can be used for faster communication for example.
Chapter 1 Introduction
CSI
Slave mode
8-bits
(support continuous data transfer,
therefore the FG2 CSIB1can use 16-bit data
MSB first
transmission/reception mode
User's Manual U17763EE1V1UD00
19