LH1594 SHARP [Sharp Electrionic Components], LH1594 Datasheet - Page 7

• Manufacturer Part Number: LH1594
• Description: 80-Segment and 17-Common Outputs LCD Driver IC with A Built-in CGROM
• Manufacturer: SHARP [Sharp Electrionic Components]

1.5. Pins for Oscillation Circuit
* Master clock : Clock for oscillation circuit or external clock.
SEGS
COM
SYMBOL
SYMBOL
COMS
OSCO
COMI
SHL
SHL
OSCI
CKS
0
CK
0
-COM
-SEGS
0
1
15
9
I/O
I/O
O
O
O
O
O
I
I
I
I
Common output pins for LCD drive.
By a combination of the scanning data and M signal, one signal level among V
V
Common output pin for marker display.
When executing duty + 1 (PLUS) command, it functions as a common output pin.
Having two output pins for COMI, they output same level. It is able to select output
pin for COMI when wiring pattern.
Common drive output pin for static LCD drive (for annunciator display).
Having two output pins for COMS, they output same level. It is able to select output
pin for COMS when wiring pattern.
When DA = "0", outputs V
Segment drive output pin for static LCD drive (for annunciator display).
One level is selected from V
COMS signal and display data.
When DA = "0", outputs V
Input pin to control the transfer direction of the segment and common signal output
data.
SHL
SHL
SHL
SHL
Feedback-resistance connecting pin for the internal oscillation circuit.
Input pin of display master clock.
When using CK pin as an input of the master clock, fix OSCI pin to V
When using the internal oscillation circuit as the display master clock, fix CK pin to
V
Selection input pin of display master clock.
CKS = "H" : Input the external clock to CK pin.
CKS = "L" : The internal oscillation circuit by using OSCI and OSCO pins is used.
4
SS
Data
and V
COMI state
.
0
0
1
1
H
H
L
L
= "0" : Segment data display direction is SEG
= "1" : Segment data display direction is SEG
= "0" : Common data display direction is COM
= "1" : Common data display direction is COM
SS
M
H
H
L
L
is selected.
Output level
COM
COM
V
V
V
V
16
SS
1
0
4
8
(when displaying 2 lines),
(when displaying 1 line)
7
SS
SS
Duty + 1 ON
DD
level.
level.
and V
DESCRIPTION
DESCRIPTION
SS
levels depending on the combination of
Duty + 1 OFF
0
79
0
15
V
to SEG
to COM
to SEG
0
to COM
or V
4
79
0
15
.
.
0
.
.
LH1594/LH1595
SS
.
0
, V
1
,