HD66789 Datasheet, PDF (33/156 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
FLD1-0
FLD1
0
0
1
1
FLD0
0
1
0
1
Number of Fields
Setting disabled
1 field
Setting disabled
3 fields
Preliminary
NW5-0: Specify n, the number of raster-rows from 1 to 64 to alternate every n+1 raster-rows when C-
pattern waveform is generated (B/C = 1).
EOR: When EOR = 1 and a C-pattern waveform is generated (B/C =1), an odd/even frame select signal
and an n-raster-row inversion signal are AC-driven. This instruction is available when liquid crystal AC
drive is not made depending on the combination of numbers of LCD drive raster-rows and the value of “n”
of n-raster-row inversion AC drive. For details, see “n-raster-row inversion AC drive”.
B/C: When B/C =0, a field AC waveform is generated. Alternation occurs every frame when driving liquid
crystal. When B/C=1, alternation occurs every n raster-row. For details, see the “n-raster-row Inversion
AC Drive” section.
Entry Mode (R03h)
Compare Register 1 (R04h)
Compare Register 2 (R05h)
R/W RS
W1
IB15 IB14 IB13 IB12 IB11 IB10 IB9 IB8 IB7 IB6 IB5 IB4 IB3 IB2 IB1 IB0
TRI DFM1 DFM0 BGR 0 0 HWM 0 0 0 I/D1 I/D0 AM LG2 LG1 LG0
W1
0 0 CP11 CP10 CP9 CP8 CP7 CP6 0 0 CP5 CP4 CP3 CP2 CP1 CP0
W1
0 0 0 0 0 0 0 0 0 0 CP17 CP16 CP15 CP14 CP13 CP12
The HD66789 modifies write data sent from the microcomputer before writing to GRAM. This enables
high-speed GRAM data update, and reduces the load on the microcomputer software. For details, see the
“Graphics Operation Function” section.
TRI: RAM write data are transmitted in 3 times through 8-bit interface when TRI = 1. When 8-bit
interface mode is not selected, set TRI to 0.
DFM1-0: Specify the data format for the RAM write data transmission when TRI = 1 (8-bit interface mode
only).
DFM1-0 = “10” : 262k mode (6bit x 3 transmissions)
DFM1-0 = “11” : 65k mode (5,6,5 bits transmissions)
Rev.0.12, May 09 2003, page 33 of 156