Aiwa CX-BK7, Service Manual

Page: 110 / 160

110
CX-BK7
• USB AUX BOARD IC700 uAC3553B (USB INTERFACE)
Pin No. Pin Name I/O Description
1
XTI
I
System clock input terminal (12 MHz)
2
XTO
O
System clock output terminal (12 MHz)
3 AREG1 I
Connected to the external capacitor
4 AVSS_12 — Ground terminal
5 OUTL O
USB audio signal output terminal (L-ch)
6 OUTR O
USB audio signal output terminal (R-ch)
7 AREG0 I
Connected to the external capacitor
8 AVDD —
Power supply terminal (+5V)
9 DAI I Not used
10 WSI I Not used
11 CLI I Not used
12 INT_DATA O Interrupt request signal output to the system controller
13 ACK O Acknowledge signal output to the system controller
14 to 19 NC — Not used
20 SDA I/O Two-way I2C data bus with the system controller
21 SCL I/O Two-way I2C clock bus with the system controller
22 TRDY I Not used
23 VREG I
Connected to the external capacitor
24 VBUS I
USB connect detection signal input terminal
25 D– I
USB data (–) input terminal
26 D+ I
USB data (+) input terminal
27 VSS — Ground terminal
28 VDD —
Power supply terminal (+5V)
29
TEST
I
Input terminal for the test
30 REST I Not used
31 SUSPEND I Not used
32 SOF I Not used
33 SEN I Not used
34 FOUTL O
USB audio signal output terminal (L-ch)
35 FOPL I Not used
36 FINL O
USB audio signal input terminal (L-ch)
37 FOUTR O
USB audio signal output terminal (R-ch)
38 FOPR I Not used
39 FINR O
USB audio signal input terminal (R-ch)
40, 41 NC — Not used
42 SGND — Ground terminal
43 SREF I Not used
44 NC I Not used