HD66781 Datasheet, PDF (118/196 Pages) Renesas Technology Corp – 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM

HD66781
Preliminary
Data transmission synchronization in 16-bit bus interface mode
The HD66781 supports the data transmission synchronization function, which resets the counter that counts
the number of data transmission of upper 2 bits and lower 16 bits or upper 16 bits and lower 2 bits in the
16-bit data bus interface 2-transmission mode. When a discrepancy occurs in the data transmission of the
upper/lower bits due to effects from noise and so on, the “000” H instruction is written 4 times
consecutively to reset the upper/lower counters so that data transmission restarts with the upper bit
transmission. Periodical execution of synchronization function allows the display system to recover from
excursion.
RS
RD
WR
DB17~10
DB8~1
Upper
Lower
“000”H “000”H “000”H “000”H
Upper Lower Upper
(16-bit transmission synchronization)
Data Transmission Synchronization
Rev.0.5, July.31.2003, page 118 of 196