ST7066U
n Reset Function
Initializing by Internal Reset Circuit
An internal reset circuit automatically initializes the ST7066U when the power is turned on. The
following instructions are executed during the initialization. The busy flag (BF) is kept in the busy state
until the initialization ends (BF = 1). The busy state lasts for 40 ms after VCC rises to 4.5 V.
1. Display clear
2. Function set:
DL = 1; 8-bit interface data
N = 0; 1-line display
F = 0; 5x8 dot character font
3. Display on/off control:
D = 0; Display off
C = 0; Cursor off
B = 0; Blinking off
4. Entry mode set:
I/D = 1; Increment by 1
S = 0; No shift
Note:
If the electrical characteristics conditions listed in the table Power Supply Conditions (Page 31) are not met, the
internal reset circuit will not operate normally and will fail to initialize the ST7066U. For such a case, initialization
must be performed by the MPU as explain by the following figures.
V2.2
22/42
2006/05/11
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
