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• IC901 HD64F2134FA20 (Display
µ
COM port assign) (DISPLAY Board)
Pin No.
Pin Name
I/O
Function
1
RESET
I
Reset
2
XTAL
I
20MHz master clock
3
XTAL
O
20MHz master clock
4
MD1
I
1: normal/0:boot
5
MD0
I
Ground
6
NMI
I
Ground
7
STBY
I
+5V
8
VCC
—
+5V
9
FL-CLK
O
FL driver clock (positive)
10
FL-LAT
O
FL driver latch (negative)
11
FL-DAT
O
FL driver data (positive)
12
VSS
—
Ground
13
FL-CLR
O
FL driver clear (1 = clear)
14
EXCL
I
Pull down (10k)
15
EXP-DO
O
External LED data (positive)
16
EXP-OE
O
External LED OE (0 = enable)
17
EXP-LAT
O
External LED latch (posi edge)
18
EXP-CLK
O
External LED clock (posi edge)
19
P91
O
LED “Phono” (0 = on)
20
P90
I
Pull down (10k)
21
POW CONT
O
Power control (0 = on)
22
MON STATUS
O
Monitor status (positive)
23
CTRL LAT
O
Control latch (positive)
24
CTRL-A1 OUT
O
Control-A1 output (H-act)
25
CTRL-A1 IN
I
Control-A1 input (L-act)
26
VOL UP
O
Volume moter increse (1 = on)
27
VOL DOWN
O
Volume moter decrese (1 = on)
28
VOL LED
O
LED “VOLUME”
(0 = on)
29
AVCC
—
+5V
30
VOL-POS
I
Volume position A/D inpit
31
AN1
I
Ground
I
Ground
I
Sircs input (“L”-act)
I
SW input selector bit3 (“L”-act)
I
SW input selector bit2 (“L”-act)
I
SW input selector bit1 (“L”-act)
I
SW input selector bit0 (“L”-act)
—
Ground
O
Communicate with CONT
I
Communicate with CONT
I
Push SW “DIGITAL/ANALOG” (“L” = ON)
42
AUDIO SPLIT SW
I
Push SW “AUDIO SPLIT” (“L” = on)
43
2CH SW
I
Push SW “2CH” (“L” = on)
44
MODE+ SW
I
Push SW “MODE+” (“L” = on)
45
MODE– SW
I
Push SW “MODE–” (“L” = on)
46
DOL/MPEG SW
I
Push SW “DOLBY/MPEG/DTS” (“L” = on)
47
VCC
—
+5V
48
EQ-BANK SW
I
Push SW “EQ-BANK” (“L” = on)
49
DIG/ANA LED
O
LED “DIGITAL/ANALOG” (0 = on)
50
AUD-SPLIT LED
O
LED “AUDIO SPLIT” (0 = on)
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