ROBO-503/ROBO-503N
ROBO-503/ROBO-503N User ’s Manual
37
3.7.27 Audio Connector (CN11)
Signal
PIN
Signal
Line-Out R
1
2
Line-Out L
GND
3
4
GND
Line-In R
5
6
Line-In L
Mic Bias
7
8
Mic
SPK R
9
10
SPK L
3.7.28 Signal Description – Audio Connector (CN11)
SPK L/R
Left and right speaker output. These are the speaker outputs directly from the speaker
amplifier. Coupling capacitors must be used in order to avoid DC-currents in the speakers. If
the Audio Bracket is used these signals are supplied on the PCB. GND should be used as
return for each speaker. Maximum power: 0.5W@4
Ω
load for each channel.
Mic / Mic Bias The MIC signal is used for microphone input. This input is fed to the left microphone channel.
Mic Bias provides 3.3V supplied through 3.2K
Ω
with capacitive decoupling to GND. This
signal may be used for bias of some microphone types.
Line-In L/R
Left and right line in signals.
Line-Out L/R
Left and right line out signals. Both signals are capacitor coupled and should have GND as
return.
3.7.29 USB Connector (CN12)
Signal
PIN
CH2 CH1
Signal
VCC1
1
2
GND
D1-
3
4
GND
D1+
5
6
D2+
GND
7
8
D2-
GND
9
10
VCC2
3.7.30 Signal Description – USB Connector (CN12)
D1+ / D1-
Differential bi-directional data signal for USB channel 0. Clock is transmitted along with the
data using NRZI encoding. The signalling bit rate is up to 12 Mbs.
D2+ / D2-
Differential bi-directional data signal for USB channel 1. Clock is transmitted along with the
data using NRZI encoding. The signalling bit rate is up to 12 Mbs.
VCC
5 V DC supply for external devices. Maximum load according to USB standard.
