3-Wire Serial I/O Mode Operation With Automatic Transmit/Receive Function - NEC mPD780208 Subseries User Manual

14.4.3

3-wire serial I/O mode operation with automatic transmit/receive function

This 3-wire serial I/O mode is used for transmission/reception of up to 64-byte data without using software.
Once transfer is started, the set number of bytes of the data prestored in the RAM can be transmitted, and the
set number of bytes of data can be received and stored in the RAM.
Handshake signals (STB and BUSY) are supported by hardware to transmit/receive data continuously. An
OSD (On Screen Display) LSI and peripheral LSI including an LCD controller/driver can be connected without
difficulty.
(1) Register setting
The 3-wire serial I/O mode with automatic transmit/receive function is set by serial operating mode
register 1 (CSIM1), the automatic data transmit/receive control register (ADTC), and the automatic data
transmit/receive interval specification register (ADTI).
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CHAPTER 14 SERIAL INTERFACE CHANNEL 1
User's Manual U11302EJ4V0UM