PT6314_10 Datasheet, PDF (21/42 Pages) Princeton Technology Corp – Dot Character VFD Controller/Driver IC

PT6314
5.8.2 i80 TYPE PARALLEL DATA TRANSFER
The i80 type of parallel data transfer mode is selected when IFSEL is set to “1”and MCU is set to “0”. A type of pipeline
process is performed between LSIs via the bus holder attached to the internal data bus whenever data is sent from the
MCU. It is important to take note that certain restrictions exists in the read sequence of this display data RAM. The data
of the specified address is not generated by the read instructions issued immediately after the address setup. This data
is generated in the when the data is read the second time. Thus, a dummy read is required whenever the address setup
or write cycle operation is selected. Please refer to the diagrams below.
WRITING
READING
V1.5
21
October 2009