14
TRI-COLOR LED CONNECTION CIRCUIT
36
EPSON
S5U1C17801T1100 HARDWARE MANUAL
(SOFTWARE EVALUATION TOOL FOR S1C17801)
14
Tri-color LED Connection Circuit
The SVT
17801
is equipped with a tri-color LED being connected to the S
1
C
17801
as shown in the following dia-
gram.
+5V
LED1
598-9920-307F
R92
R31
MMBTA42-TP
S1C17801
P14
P16
P15
MMBT
A42-TP
MMBT
A42-T
P
Q4
Q2
Q3
1K
R29
1K
R30
1K
R28
R26
R27
5.1K
1.8K
1.8K
1
2
3
0
4
Fig.
14
.
1
Tri-color LED Connection Circuit
As the figure
14
.
1
shows, P
14
/P
15
/P
16
ports are connected to the tri-color LED, H/L combination of which can
represent total seven colors. The following table lists the LED colors formed by H/L combination of each port.
Table
14
.
1
Color on Tri-color LED Corresponding to Port Status
S1C17801
Color on Tri-color LED
P16
P15
P14
L
L
L
●
(light off)
L
L
H
●
(green)
L
H
L
●
(blue)
L
H
H
●
(aqua)
H
L
L
●
(red)
H
L
H
●
(orange)
H
H
L
●
(purple)
H
H
H
○
(white)
Summary of Contents for S5U1C17801T1100
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