HD66773R Datasheet, PDF (68/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
b) Example of high-speed consecutive RAM write
CS*
(Input)
WR
(Input)
DB17-0
(Input/output)
1 2341 2341 234
Index
㧔R22㧕
RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM
data data data data data data data data data data data data
1 2 3 4 5 6 7 8 9 10 11 12
RAM write
execution time
RAM wite
execution time
RAM write
execution time*
Index
RAM write data
(72 bits)
RAM
data 1 to 4
RAM
data 5 to 8
RAM
data 9 to 12
RAM address
(AC15-0)
"0000"H
"0004"H
"0008"H
* Set the lower two bits of the address as follows in the high-speed write mode.
When ID0 = “0”, the lower two bits of the address must be set to “11”.
When ID1 = “0”, the lower two bits of the address must be set to “00”.
"000A"H
Note: When terminating high-speed RAM write, wait until RAM write execution is completed (tCYC: bus cycle time
for nomal RAM write before executing a next instruction.
C) Example of high-speed consecutive RAM write
CS *
(input)
WR
(input)
DB17-10
(input/
output)
1 2 3 4 5 6 7 81 2 3 4 5 6 7 8
RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM
Index data data data data data data data data data data data data data data data data
㧔R22㧕 ^{(1) (1) (2) (2) (3) (3) (4) (4) (1) (1) (2) (2) (3) (3) (4) (4)}
Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower
RAM write execution time
RAM write execution time㧖
RAM write data
( 64-bit )
RAM data
(1) - (4)
RAM data
(5) - (8)
RAM address
( AC15-0 )
"0000"H
"0004"
* Set the lower two bits of the address as follows in the high-speed write mode.
When ID0 = “0”, the lower two bits of the address must be set to “11”.
When ID1 = “0”, the lower two bits of the address must be set to “00”.
Note: The high-speed burst RAM write function wirtes data to RAM every 4 words. This means in the 8-bit interface mode,
RAM write is executed every 8 write operations to the internal register.
Rev.1.10, Jun.21.2003, page 68 of 133