HD66787 Datasheet, PDF (84/159 Pages) Renesas Technology Corp – 528-channel, One-chip Driver with 262,144-color Display RAM and Power Supply Circuit for Low-temperature Poli-Si TFT (LTPS-TFT) Panels with Incorporat

HD66787
A)Basic data transmission through SPI
Data transmission start
CS*
(Input)
Preliminary
Data transmission end
SCL
(Input)
SDI
(Input)
SDO
(Output)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ₂₁ 22 _{23 24}
“0” “1” “1” “1” “0”
MSB
LSB
ID RS RW D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Device ID code
RS RW
Start byte
Index register setting, instruction, RAM data write
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Status read, instruction read, RAM data read
B)Consecutive data transmission through SPI
CS*
(Input)
SCL
(Input)
1 23 4 5 67 8
9 10 1112 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
SDI
(Input)
Start
Start byte
Instruction1:
upper eight bits
Instruction1:
lower eight bits
Instruction2:
upper eight bits
Instruction1:
End
execution time
Note: The first byte after the start byte is always the upper eight bits.
C) RAM data read transmission
CS*
(Input)
SCL
(Input)
SDI
(Input)
Start byte
RS = 1,
R/W = 1
SDO
(Output)
Dummy
Read 1
Dummy
Read 2
Dummy
Read 3
Dummy
Read 4
Dummy
Read 5
RAM read
Upper 8
bits
Start
Note: Five bytes of invalid dummy data are read after the start byte.
The valid data are read from the 6th byte.
RAM read
Lower 8
bits
End
D) Status read / instruction read
CS*
(Input)
SCL
(Input)
SDI
(Input)
Start byte
RS = 1,
R/W = 1
SDO
(Output)
Dummy read 1
Status read:
upper eight bits
Status read:
lower eight bits
Start
End
Note: One byte of invalid dummy data are read after the start byte.
The valid data are read from the second byte.
Data transmission through SPI
Rev.0.22, May.23.2003, page 84 of 159