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Atmel SAM4S-EK2 Atmel ATSAM4S-EK2 ATSAM4S-EK2 Data Sheet

Product codes
ATSAM4S-EK2
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Evaluation Kit Hardware
SAM4S-EK2 User Guide
4-19
11176A–ATARM–24-Sep-12
4.4.2
Jumpers
The SAM4S-EK2 board jumpers are essentially used for two main purposes: functional selection or cur-
rent measurement. Details are given below.
Table 4-4.  Jumpers Setting 
Designation
Label
Default Setting
Feature
JP1
JTAG
OPEN
Close to select the JTAG boundary scan of the SAM4SD32
JP2 ADVREF
1-2
Analog reference voltage selection between 3.3V (close 1-2) and 
2.5V (close 2-3)
JP3
ERASE
OPEN
Close to reinitialize the Flash contents and some of its NVM bits. 
JP4
TEST
Not populated 
(OPEN)
Close for manufacturing test or fast programming mode
JP5
VDDPLL
CLOSE
Access for current measurement on VDDPLL 
JP6
VDDIO
CLOSE
Access for current measurement on VDDIO
JP7
VDDIN
CLOSE
Access for current measurement on VDDIN
JP8
VDDCORE
CLOSE
Access for current measurement on VDDCORE
JP9
CE FLASH
CLOSE
NCS0 enable NAND Flash chip select 
JP10
RS485
OPEN
Maintain differential impedance for RS485 interface
JP11
RS485
CLOSE
Maintain impedance matching for RS485 interface
JP12
RS485
OPEN
Maintain differential impedance for RS485 interface
JP13
CS
CLOSE
NCS1 chip select LCD
JP14 - JP15
MIC GAIN0
CLOSE (both) 20db
OPEN (both) 26db
Close both to lower gain stage on microphone input.
JP16
ADC input
OPEN
Close for impedance matching on ADC BNC port
JP17 – JP19
MIC Gain stage 
Close to mux RIN/LIN into MONO-IN path within audio PA
JP18 SELECT 
ADC 
INP
1-2
2-3
ADC input potentiometer
ADC input BNC
JP20
MONO/STEREO
CLOSE
Close to fix in mono speaker, no matter the stereo plug state
JP21
DAC output
OPEN
Close for impedance matching on DAC BNC port
JP22
PIO expansion J12 
voltage supply
2-3
Set to 3.3V (position 1-2 sets to 5V)
JP23
PIO expansion J13 
voltage supply
2-3
Set to 3.3V (position 1-2 sets to 5V)
JP24
PIO expansion J14 
voltage supply
2-3
Set to 3.3V (position 1-2 sets to 5V)
JP25
BP2
CLOSE
Open to disconnect and free PB3 for custom usage
JP26
BP3
CLOSE
Open to disconnect and free PC12 for custom usage
JP27
ZIGBEE
CLOSE
Power supply connection/disconnection for the ZigBEE module 
May also be used as a current measurement point