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15
2.3.5 *FireWire (IEEE1394A) Pin Header: *J148/*J149
Signal Pin Pin Signal
NC1
1 2
Key
TPA +
3 4
TPA ?
GND
5 6
GND
TPB +
7 8
TPB ?
+12V
9 10
+12V
GND
11 12
GND
NC2
13 14
Key
Note: J148 & J149 are only
available on S2877ANRF
version.
2.3.6 Buzzer/External Speaker Header: J14
PIN1
Pin # Signal Description
1 Speaker+
2 NC
3 Buzzer-
4 Speaker-
Close Pin3 and Pin4 (Default)
Enable onboard buzzer
Open Pin3 and Pin4
Disable onboard buzzer or
connect to chassis speaker