HD66712 Datasheet, PDF (68/88 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver

HD66712U
Initializing by Instruction
If the power supply conditions for correctly operating the internal reset circuit are not met, initialization
by instructions becomes necessary.
• Initializing when a length of interface is 8-bit system. (See Figure 29.)
• Initializing when a length of interface is 4-bit system. (See Figure 30.)
Power on
• Wait for more than 15 ms
after V_CC rises to 4.5V
(V_CC = 5V during operation)
• Wait for more than 40 ms
after V_CC rises to 2.7V
(V_CC = 3V during operation)
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
000011****
Wait for more than 4.1 ms
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long.)
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
000011****
Wait for more than 100 µs
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long.)
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
000011****
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
000011N0 * *
0000001000
0000000001
0 0 0 0 0 0 0 1 I/D S
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.)
Function set
Display off
Display clear
Entry mode set
Initialization ends
Figure 29 Initializing Flow of 8-Bit Interface
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