User manual

Atmel SAM4S Xplained Pro [USER GUIDE]
Atmel-42075B-MCU-Atmel SAM4S Xplained Pro-USER GUIDE-03/2013
15
Table 4.7. NAND Flash connections
SAM4S pin Function NAND Flash
function
Shared functionality
PC0 D0 IO0 LCD connector
PC1 D1 IO1 LCD connector
PC2 D2 IO2 LCD connector
PC3 D3 IO3 LCD connector
PC4 D4 IO4 LCD connector
PC5 D5 IO5 LCD connector
PC6 D6 IO6 LCD connector
PC7 D7 IO7 LCD connector
PC9 NANDOE RE (active low)
PC10 NANDWE WE (active low)
PC13 GPIO R (active high)/ B
(active low)
PC14 NCS[0] CE (active low)
PC16 NANDALE ALE (active low)
PC17 NANDCLE CLE
4.2.2 SD Card connector
The SAM4S Xplained Pro kit has one SD card connector which is connected to High Speed Multimedia Card
Interface (HSMCI) of the SAM4S
Table 4.8. SD Card connections
SAM4S pin Function SD Card function Shared functionality
PA26 MCDA2 DAT2 SPARE Signal and PIOD Interface
headers
PA27 MCDA3 DAT3 SPARE Signal and PIOD Interface
headers
PA28 MCCDA CMD SPARE Signal and PIOD Interface
headers
PA29 MCCK CLK SPARE Signal and PIOD Interface
headers
PA30 MCDA0 DAT0 PIOD Interface header
PA31 MCDA1 DAT1 SPARE Signal and PIOD Interface
headers
PC12 GPIO Card Detect
4.2.3 Crystals
The SAM4S Xplained Pro kit contains two crystals that can be used as clock sources for the SAM4S device.
Each crystal has a cut-strap next to it that can be used to measure the oscillator safety factor. This is done by
cutting the strap and adding a resistor across the strap. More information about oscillator allowance and safety
factor can be found in appnote AVR4100
1
.
Table 4.9. External 32.768kHz crystals
Pin on SAM4S Function
PA49 XIN32
PA48 XOUT32
1
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