PT6314_10 Datasheet, PDF (22/42 Pages) Princeton Technology Corp – Dot Character VFD Controller/Driver IC

PT6314
5.8.3 SERIAL DATA TRANSFER
PT6314 supports serial data transfer mode. When data is written, it can be inputted when the Strobe goes to “0”. The first
byte -- Start Byte consists of a total of 8 bits: the Synchronous bits (bit 1 - bit 5), R/W (bit 6), RS (bit 7) and bit 8. The
register will be selected (IR or DR) by the RS (bit 7) and the data write or read is selected by R/W (bit 6 = “0”) in this byte.
The Start Byte is followed by the 8-bit Instruction Byte. The Start Byte selects which is process is to be inputted first: read
the Busy Flag + Address Counter (AC6 to AC0) or read the data which was written in the DDRAM or CGRAM. Data is
outputted at the falling edge of the shift clock.
DATA WRITE
DATA READ
V1.5
22
October 2009