Table of Contents
Advertisement
5
Check 14: Is USB Circuit OK?
<Outline>
The data is transmitted through D+, D- and SDA of HOST I/F while playing USB/IPOD.
USB memory uses only D+ and D-, but IPOD uses SDA (DATA) and SCL (CLOCK) in addition to D+ and D-.
IC1501
DVD-LSI
<Check Method>
1. USB Memory: Play a song from USB memory and check D+ and D- with the DGND1 standards.
2. iPod: Connect iPod and check CP_RESET, SDATA and SCLOCK with the DGND1 standards until the Pioneer log
appears. When iPod Touch or iPhone is connected, the logo is not displayed but only a check mark is displayed.
Play a song from iPod and check D+/D- with the DGND1 standards.
When it does not conform to the standards, check appropriate line, main parts shown in the above figure,soldering of
peripheral parts and malfunctions in parts.
No.
Checking spot (stylus)
1
CP_RESET
2
SDATA
3
SCLOCK
4
D+
5
D-
Standard
value 1
Side A
5
6
CP_RESET
I2C_SDA
I2C_SCL
D+
D-
DGND
Fig. 14-1: USB Circuit
Standard value 1
Standard value 2
VCC33*0.7 or more
VCC33*0.7 or more VCC33*0.2 or less
VCC33*0.7 or more VCC33*0.2 or less
VCC33*0.7 or more VCC33*0.3 or less
VCC33*0.7 or more VCC33*0.3 or less
Standard
value 2
Fig.14.2: USB Circuit Communication Wave
D-
D+
SCLOCK
AVIC-X940BT/XNUC
6
7
CN1952
HOST I/F
*Until the pioneer log appears after connecting the iPod
*Until the pioneer log appears after connecting the iPod
SDATA
CP_RESET
DGND1
7
8
A
B
C
D
E
F
69
8
Advertisement
Table of Contents
