M5253 Demo Board User Manual, Rev. 0
Hardware Submodules
Freescale Semiconductor12
3.23 Jumpers and Headers
There are several jumpers on the M5253 demo board that allow the user to control the hardware
configuration. The following table provides descriptions for all the jumper settings.
Table 7. Jumper Settings
Reference
Designator
Setting
12
Function
J21
*1:2*
BOOT from CS0
2:3 BOOT from internal ROM(for serial bus boot)
J29,J30,J31
Refer Table 4 for detail(no shunt default)
J16
1:2 Audio CLK from LRCK3 PIN
*2:3*
Audio CLK from CRIN PIN
J26,J32
ON USB host enable
*OFF*
USB device/otg mode
J25
ON
I
2
C0/SDATA pin use for SD socket function
*OFF*
I
2
C0/SDATA pin not use for SD socket function
J23
*ON*
I
2
C0/SDATA pin use for I
2
C0
OFF
I
2
C0/SDATA pin not use for I
2
C0
J10
*ON*
WM8731 MCLK come from MCLK2 of MCF5253
OFF WM8731 MCLK come from the on crystal beside
J5(2x2)
2× *ON*
AD 0,1 input from on board potentiometer
OFF AD 0,1 not input from on board potentiometer
J27(2x3)
3× *ON*
AD 2,3,4 input from on board 3-axis accelerator
OFF
AD 2,3,4 not input from on board 3-axis
accelerator
J7(2x2)
ON
BUFEN1# and TXD2 used for GPIO for SD
socket
*OFF*
BUFEN1# and TXD2 not used for GPIO for SD
socket
J24
*1:2*
RXD signal come from RXD0
3:4 RXD signal come from RXD1
5:6 RXD signal come from RXD2
