ST7032
n Reset Function
Initializing by Internal Reset Circuit
An internal reset circuit automatically initializes the ST7032 when the power is turned on. The following
instructions are executed during the initialization. The busy flag (BF) is kept in the busy state (BF = 1) until the
initialization ends. The busy state lasts for 40 ms after VDD rises to stable.
1. Display clear
2. Function set:
DL = 1; 8-bit interface data
N = 0; 1-line display
DH=0; normal 5x8 font
IS=0; use instruction table 0
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
5. Internal OSC frequency
(F2,F1,F0)=(1,0,0)
6. ICON control
Ion=0; ICON off
7. Power control
BS=0; 1/5bias
Bon=0; booster off
Fon=0; follower off
(C5,C4,C3,C2,C1,C0)=(1,0,0,0,0,0)
(Rab2,Rab1,Rab0)=(0,1,0)
Note:
If the electrical characteristics conditions listed under the table Power Supply Conditions Using
Internal Reset Circuit are not met, the internal reset circuit will not operate normally and will fail to initialize the
ST7032.
When internal Reset Circuit not operate, ST7032 can be reset by XRESET pin from MPU control signal.
V1.4
28/61
2008/08/18