Onkyo SE-U55

SE-U55
Microprocessor terminal descriptions
No. Pin!Name I/O Functio
n
1 3.3V +3.3V
2 RESET I Reset!in
p
ut!
(
RESET:"L"
)
3 GND I GND
4 GND I/O GND
5 4MHz I External!4MHz!clock!in
p
ut
6 4MHz I External!4MHz!clock!in
p
ut
7 3.3V +3.3V
8 GND GND
9 X1A O
p
en
10 CLK O CLK!si
g
nal!out
p
ut!of!SRC
(
TDA1373H
)
11 SRC_LD O LD!si
g
nal!out
p
ut!of!SRC
(
TDA1371H
)
12 SRC_RESET O Reset!out
p
ut!of!SRC
(
TDA1373H
)
13 WAV/DIR O
CODEC!output!(WAVE!or!MONITOR)!select!signal!output
(
WAVE!:!"H"
)
14 DIT!C15 O To!DIT!C15
p
in
15 DIT!C2 O To!DIT!C2
p
in
16 (NO!USE) O O
p
en
17 DIT!C3 O To!DIT!3
p
in
18 (NO!USE) I GND
19 GND GND
20 SRC_DA I/O Serial!data!of!SRC81373H
)
!in
p
ut/out
p
ut
21 CODEC!RST I/O To!VREF!of!USB!CODEC
(
UDA1325
)
22 DIG_ANA O EEPROM!for!USB!CODEC!select!si
g
nal!out
p
ut
23 I2C!SDA!A I/O SDA !
p
ort!for!EEPROM!writin
g
.
24 I2C!SCL!A I/O SCL!
p
ort!for!EEPROM!writin
g
.
25 I2C!SDA!D I/O
SDA!port!for!EEPROM!writing!for!DIGITAL!setup.!Usually,!i
t
considers!as!an!input!and!becomes!SDA!input!and!output!at!the
time!of!writin
g
.
26 I2C!SCL!D I/O
SCL!port!for!EEPROM!writing!for!DIGITAL!setup.!Usually,!i
t
considers!as!an!in
p
ut!and!becomes!SCL!out
p
ut!at!the!time!of
27 (NO!USE) I GND
28 EPROM!WR I/O
EEPROM!write-in!control!port.!Usually,!it!is!an!input!port,!and
immediately!after!reset,!when!this!is!"L",!"L"!is!outputted!and
EEPROM!is!written!in.
29 (NO!USE) I GND
30 MAC/WIN I The!settin
g
!switch!
(
H:WIN,!L:MAC
)
!of!WIN/MAC.
31 ONK/KORG I Co
py
ri
g
ht!out
p
ut!
p
rotection.!
(
H:normal!mode
)
32 PROTECT I Existence!of!co
py
ri
g
ht!
p
rotection!information.!
(
H:normal!mode
)
33 PON_RST O Power-on!reset.
34 CODEC!D+ I/O
D+!of!USB!CODEC!(UDA1325)!is!controlled.!Usually,!it!is!"H"
and!D+!is!
g
rounded!throu
g
h!a!diode!b
y
!"L."
35 (NO!USE) I GND
36
P
OWER!MOD
E
I
A!setup!of!POWER!MODE!of!USB.
L:!BUS!POWER!H:SELF!POWER.
37 (NO!USE) I GND
38 (NO!USE) I GND
39 (NO!USE) I GND
40 OPT/COAX I
The!change!switch!of!OPTICAL!and!COAXICAL.
H:!COAXICAL!and!L:OPTICAL.
41 UPLED O Li
g
ht!Emittin
g
!Diode!dis
p
la
y
!of!UP!
(
the!li
g
ht!is!switched!on!b
y
42 MCU!MUTE O MCU
_
MUTE!
(
it!is!MYUTO!o
p
eration!at!"L"
)
.
43 GND GND
44 3.3V 3.3V
45 MODE I
The!change!switch!of!MONITOR/INTERNAL/LINE/Medi
a
Interface!Connector.
46 (NO!USE) O GND
47 INH O Prohibition!of!an!analo
g
!in
p
ut!
(
it!forbids!b
y
!"H"
)
.
48 MIC/LINE O
An!input!change!of!Media!Interface!Connector/LINE.
H:!Media!Interface!Connector
,
!L:LINE.