HL15604
1/3 bias ( for use with normal panels )
(p 1)
(p 2)
(p 3)
(p 4)
(general-purpose
output ports)
Used with the
backlight controller
or other circuit.
OSC
COM1
COM1
+5V
VDD
COM2
*1)
COM3
VSS
TEST
P1 / SEG1
P2 / SEG2
P3 / SEG3
P4 / SEG4
C ³ 0.047uF
SEG5
VCL1
VCL2
.
.
.
.
.
.
.
.
.
.
C
C
SEG39
S S
E E
G G
4 4
1 0
CE
SCK
SI
From the controller
To the controller
(SEG40)
(SEG41)
K K K K K
/
K
/
K
K K K K
S S S S
6 5 4 3
I
I
I
I
I
N N N N N
S S
2 1
SO
5
4 3 2 1
To the controller
power supply
*2)
•
•¡Æ¡Æ
Key matrix
(up to 30 keys)
Note : *1). Add a capacitor to the power supply line so that the power supply voltage VDD rise time when power is
applied and the power supply voltage VDD fall time when power drops are both at least 1 ms, as the
HL14104 is reset by the SVD.
*2). The SO pin, being an open-drain output, requires a pull-up resistor, Select a resistance (between 1 to 10kW)
appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
25
HYNIX [ HYNIX SEMICONDUCTOR ]
