HD66781 Datasheet, PDF (132/196 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
2. Transfer procedure in DMA single address mode
Preliminary
Normal operation
HWM=1,AM=0,I/D Set
Window address set
(HSA,HEA,VSA,VEA)
Address set
Index register set
(R202h)
Words for transfer
Source address
Transfer mode set
DREQ (Transfer request
signal) output Note 1)
Detect DREQ signal
Start transfer
Data transfer
End of transfer
Release DREQ
Normal operation
Settings for
HD66781
Settings for DMAC
Note 1) Set to level acceptance
an output from an assigned control port, DREQ judgement
Transferred word counter=0
Setting for DMAC
Rev.0.5, July.31.2003, page 132 of 196