Clock And Control Port - Analog Devices UG-284 User Manual

UG-284

CLOCK AND CONTROL PORT

MCLK2
SELECTION
JUMPER
MCLK1
SELECTION
JUMPER
There are two master clock input pins for the ADAU1373:
MCLK1 and MCLK2. For each master clock, there are three
clock sources that can be selected by Jumper 21 and Jumper 22.
OSC SMA1 PSIA OSC SMA1
1
2
POSITION A POSITION B
Figure 11. Configuration for Jumpers 21 and 22
J21 is for MCLK1 selection. The position definitions are shown
Figure 11 and Table 19.
Table 19. J21
Jumper
Position Function
A Use an on-board 12.288 MHz oscillator as MCLK1.
B Use an external SMA clock input as MCLK1.
C Use an audio precision PSIA MCLK input connected
to J28 as MCLK1.
2
EXTERNAL EXTERNAL I C
CLOCK ADAPTER
IMPUT RESET CONNECTOR
Figure 10. Clock and Control Port
PSIA OSC SMA1 PSIA
1 1
2 2
POSITION C
Rev. 0 | Page 10 of 24
Evaluation Board User Guide
2 2
I C ADDRESS I C/SPI
SELECTION SELECTION
J22 is for MCLK2 selection. The position definitions are shown
in Figure 11 and Table 20.
Table 20. J22
Jumper
Position Function
A Use an on-board 12.288 MHz oscillator as MCLK2.
B Use an external SMA clock input as MCLK2.
C Use an audio precision PSIA MCLK input connected
to J29 as MCLK2.
J23 is for the external I
tion. J24 selects the control port mode of the ADAU1373. The
position definitions of this jumper are shown in Table 21.
Table 21. J24
Jumper Position
On
Off
2
J25 selects the I C device address of the ADAU1373. The
position definitions of this jumper are shown in Table 22.
Table 22. J25
Jumper Position
On
Off
2
C/SPI controller (USBi board) connec-
Function
I 2 C mode
SPI mode
Function
I 2 C devices address = 0x1C.
2
I C devices address = 0x1A.