hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 69

• Manufacturer Part Number: hd66712u
• Description: Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66712U
432
• Wait for more than 15 ms
• Wait for more than 40 ms
Wait for more than 4.1 ms
Wait for more than 100 s
RS
RS
RS
RS
0
0
0
0
0
0
0
0
0
0
0
0
0
0
after V
(V
after V
(V
CC
CC
R/W
R/W
R/W
R/W
Initialization ends
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= 5V during operation)
= 3V during operation)
Figure 30 Initializing Flow of 4-Bit Interface
CC
CC
Power on
DB7
DB7
DB7
DB7
N
N
0
0
0
0
0
0
0
1
0
0
0
0
rises to 4.5V
rises to 2.7V
DB6
DB6
DB6
DB6
0
0
0
0
0
1
0
0
0
0
0
0
0
1
DB5
DB5
DB5
DB5
I/D
1
1
1
1
1
0
1
0
0
0
0
0
*
DB4
DB4
DB4
DB4
S
1
1
1
0
0
0
0
*
0
0
0
1
0
*1
*1
*2
Notes: 1.
Important Notice
Display off
Display clear
Entry mode set (I/D, S specification)
Function set (4-bit mode, N specification)
Function set (4-bit mode, N specification)
Function set (4-bit mode)
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long)
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long)
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long)
BF can be checked after the following instructions.
When BF is not checked, the waiting time between
instructions is longer than the execution instruction
time. (See Table 12.)
2.
When DB3 to DB0 pins are open in 4-bit mode,
the N, RE, BE, LP bits are set to “1.” In this case,
instruction time becomes four times in a low
power mode (LP = “1”).
The low power mode is available in this step, so
instruction time takes four times.
BE, LP are clear to 0
*1