Philips Semiconductors
LCD controllers/drivers
Product specification
PCF2103 family
7.15 Reset function
The PCF2103 automatically initializes (resets) when power is turned on. The reset executes a ‘clear display’ instruction,
requiring 165 oscillator cycles. After the reset the chip has the state shown in Table 5.
Table 5 State after reset
STEP
INSTRUCTION
RESET STATE (BIT/REGISTER) RESET STATE (DESCRIPTION)
1 clear display
2 entry mode set
I/D = 1
+1 (increment)
S=0
no shift
3 display control
D=0
display off
C=0
cursor off
B=0
cursor character blink off
4 function set
DL = 1
8-bit interface
M=0
1-line display
H=0
normal instruction set
5 default address pointer to DDRAM; the Busy Flag (BF) indicates the busy state (BF = 1) until initialization
ends; the busy state lasts 2 ms; the chip may also be initialized by software; see Tables 16 and 17
6 icon control
IM, IB = 00
icons/icon blink disabled
7 display/screen configuration
8 I2C-bus interface reset
L, P, Q = 000
default configurations
1998 May 11
16