LinkIt 2523 HDK v11 User's Guide
© 2015 - 2016 MediaTek Inc.
Page 16 of 82
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4.3.
Jumpers
The HDK offers flexible jumper settings for customization. Table 7 summarizes the functions associated with
different jumpers.
Table 7. LinkIt 2523 HDK jumper index
Jumpers
Purpose
Features
Type
J1001
J1002
J1003
J1004
J1005
J1006
Storage options
•
eMMC
•
Micro SD
GPIO selection, see
J1007
J1008
J1009
J1010
J1011
J1012
J1015
Daughterboard options
of camera or sensor
•
Sensor daughterboard
•
Camera daughterboard
GPIO selection, see
section 4.11, “Camera”.
J1101
Selection of external
buck LDO by ROM
control or system boot
•
Enable by VIO28
•
Enable by EXT_PWREN
Power selection, see
section 4.14, “Bluetooth
J1102
MT2523 D-die eFuse
options
•
Enable by VIO28
•
Disable by GND
GPIO selection, see
J1103
32.768kHz XTAL support
(Should be synchronized
with J1104)
•
Mount the 32.768kHz XTAL
for power saving operations
•
Unmount the 32.768kHz
XTAL for cost reduction
GPIO selection, see
J1104
32.768kHz XTAL support
(Should be synchronized
with J1103)
•
Mount the 32.768kHz XTAL
needed by VIO18
•
Unmount the 32.768kHz
XTAL by VA18
GPIO selection, see
J1105
Power path for PSRAM
power source (SMT
type)
•
VIO18 for PSRAM power
source
•
VSWXM for PSRAM power
source
Power selection, see
J1106
Power path selection for
DVDD_VIO_A cluster
power source
•
VIO18 for
DVDD_VIO_A
cluster I/O voltage 1.8V
•
VIO28
for
DVDD_VIO_A
cluster
I/O voltage 2.8V
Power selection, see
J1108
Power path selection for
DVDD_VIO_C cluster
power source
•
VIO18 for
DVDD_VIO_
C
cluster I/O voltage 1.8V
•
VIO28 for
DVDD_VIO_
C
cluster I/O voltage 2.8V
Power selection, see
J1109
Power path selection for
•
VIO18 for
DVDD_GPO
cluster Power selection, see