HD66789 Datasheet, PDF (63/156 Pages) Renesas Technology Corp – 528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit

HD66789
RAM Write Data Mask (R23h)
RAM Write Data Mask (R24h)
Preliminary
R/W RS
W1
W1
IB15 IB14 IB13 IB12 IB11 IB10 IB9 IB8 IB7 IB6 IB5 IB4 IB3 IB2 IB1 IB0
0
0
WM WM WM WM WM _WM
11 10 9 8 7 ₆
0
0
WM WM WM WM WM _WM
54
321 0
0
0 0 00
111
0
1
WM WM WM WM WM WM
17 16 15 14 13 12
WM17–0: Write-mask the data when they are written to GRAM by bit. For example, if WM17 = 1, the
WM17 write-mask the MSB of the data to write to GRAM so that the data in the MSB are not written to
GRAM. The rest of WM16-0 bits also write-mask the data in the corresponding bits when these bits are set
to “1”. For details, see the “Graphics Operation Function” section.
The WM17-0 bits write-mask the data to write to GRAM, which are expanded, if necessary, into 18 bits.
This function is not available in the RGB-I/F mode.
Write mask ^{WM WM WM WM WM WM WM WM WM WM WM WM WM WM WM WM WM WM}
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write data to _{R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0}
GRAM
One pixel
RAM write data mask
Rev.0.12, May 09 2003, page 63 of 156