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NXP Semiconductors
AN12306
A71CL Quick start guide for A71CLARD-BAI and Kinetis
515910
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© NXP B.V. 2018. All rights reserved.
Application note
COMPANY PUBLIC
Rev. 1.0 — 14 December 2018
515910
5 of 32
Fig 2. A71 mini PCB
To enable the I
2
C communication protocol, it is necessary to configure JP5/6 according
to
Table 2
. JP2 connects the A71 to the on-board 3.3V voltage regulator on the MiniPCB
board. The jumpers JP3 and JP4 enable the I²C SDA/SCL pull-up resistors. JP7 can be
used to connect the A71 reset signal.
Table 2.
Default MiniPCB Jumper settings
Jumper
Setting
Usage
JP1
Not set
External VCC connection
JP2
3-4
Connect A71 to 3.3V regulator on MiniPCB
JP3
Set
Connect I²C SDA pull-up resistor
JP4
Set
Connect I²C SCL pull-up resistor
JP5
1-2
Use I²C address 0x92/0x93
2-3 (Default)
Use I²C address 0x90/0x91
JP6
1-2
Activate I²C interface
JP7
Not set (Default)
A71 operates
Set
A71 IC reset
The board schematic and layout are shown in
Fig 3
and
Fig 4
.