PT6314 データシートの表示（PDF） - Princeton Technology

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PT6314

Dot Character VFD Controller/Driver IC

Princeton Technology 

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

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