hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 38

• Manufacturer Part Number: hd66740
• Description: 112 X 80-dot Graphics Lcd Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66740
(Input)
(Input)
b) Consecutive Data-transfer Timing through Clock-synchronized Serial Bus Interface
c) RAM Data Read-transfer Timing
a) Basic Data-transfer Timing through Clock-synchronized Serial Bus Interface
output)
output)
output)
(Input/
(Input/
(Input/
(Input)
(Input)
(Input)
(Input)
CS*
SCL
SDA
SDA
SDA
SCL
SCL
CS*
CS*
Note: When instruciton 1 is a clear display instruction, adjust the transfer rate so that the 8th bit of instruction 2
Note: Two bytes of the RAM read data after the start byte are invalid. The HD66740 starts to read the correct
Transfer start
Start
Start
RAM data from the third byte.
is transferred after execution of the clear display instruction.
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Start byte
RS = 1, R/W = 1
1
"0"
Figure 16
Start byte
"1"
2
Device ID code
"1"
3
Start byte
4
"1"
Clock-synchronized Serial Interface Timing Sequence
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
5
"0"
Dummy read 1
Instruction 1
6
ID
RS
7
RS
R/W
R/W
8
38
Instruction 1
execution time
MSB
DB7 DB6 DB5 DB4
9
17 18 19
17 18 19
Instruction, RAM data
Dummy read 2
Instruction 2
10
20 21 22 23 24
20 21 22 23 24
11
12
Instruction 2
execution time
13
DB3 DB2 DB1 DB0
25 26 27 28 29 30 31 32
25 26 27 28 29 30 31 32
RAM data read 1
14
Instruction 3
15
16
LSB
Transfer end
End
End