User manual

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