User manual

Evaluation Kit Hardware
SAM4S-EK2 User Guide 4-3
11176A–ATARM–24-Sep-12
The SAM4SD32 features an External Bus Interface (EBI) that permits interfacing to a broad range of
external memories and virtually to any parallel peripheral. The SAM4S-EK2 board is equipped with a
memory device connected to the SAM4 EBI:
 One NAND Flash MT29F2G08ABAEA.
Figure 4-2. NAND Flash
NCS0 chip select signal is used for NAND Flash chip selection. Furthermore, a dedicated jumper can
disconnect it from the on-board memories, thereby letting NCS0 free for other custom purposes.
4.3.3 Clock Circuitry
The clock generator of a SAM4SD32 microcontroller is composed of:
 A Low Power 32.768 Hz Slow Clock Oscillator with bypass mode
 A 3 to 20 MHz Crystal Oscillator, which can be bypassed (12 MHz needed in case of USB)
 A factory programmed fast internal RC Oscillator. 3 output frequencies can be selected: 4 (default
value), 8 or 12 MHz.
 A 60 to 130 MHz PLL (PLLB) providing a clock for the USB Full Speed Controller
 A 60 to 130 MHz programmable PLL (PLLA), capable to provide the clock MCK to the processor and
to the peripherals. The input frequency of PLLA is from 7.5 to 20 MHz
The SAM4S-EK2 board is equipped with one 12 MHz crystal, optional Piezoelectric Ceramic Resonator
12 MHz (Murata ref. CSTCE12M0G15L99-R0), one 32.768 Hz crystal and an external clock input con-
nector (optional, not populated by default).
Figure 4-3. External Clock Source
MN3
WE
18
N.C6
6
VCC
37
CE
9
RE
8
N.C11
20
WP
19
N.C5
5
N.C1
1
N.C2
2
N.C3
3
N.C4
4
N.C12
21
N.C13
22
N.C14
23
N.C15
24
R/B
7
N.C17
26
N.C18
27
N.C19
28
I/O 0
29
N.C21
34
N.C22
35
VSS
36
PRE
38
N.C23
39
VCC
12
VSS
13
ALE
17
N.C8
11
N.C7
10
N.C9
14
N.C10
15
CL E
16
N.C16
25
N.C20
33
I/O 1
30
I/O 3
32
I/O 2
31
N.C27
47
N.C26
46
N.C25
45
I/O 7
44
I/O 6
43
I/O 5
42
I/O 4
41
N.C24
40
N.C28
48
MT 29F2 G08 ABAEA
JP 9
He ade r2
C2 8
100nF
NAND FLASH
PC18
C2 9
1uF
+3V3
PC14
DG ND
R1 6
47K
R2 2
0R
DNP
R2 1 47K
R1 9 0R
DG ND
+3V3
C2 7
100nF
PC7
PC6
PC5
PC4
PC0
PC1
PC2
PC3
R1 5
47K
+3V3
PC10
PC9
PC16
PC17
+3V3
MN3
WE
18
N.C6
6
VCC
37
CE
9
RE
8
N.C11
20
WP
19
N.C5
5
N.C1
1
N.C2
2
N.C3
3
N.C4
4
N.C12
21
N.C13
22
N.C14
23
N.C15
24
R/B
7
N.C17
26
N.C18
27
N.C19
28
I/O 0
29
N.C21
34
N.C22
35
VSS
36
PRE
38
N.C23
39
VCC
12
VSS
13
ALE
17
N.C8
11
N.C7
10
N.C9
14
N.C10
15
CL E
16
N.C16
25
N.C20
33
I/O 1
30
I/O 3
32
I/O 2
31
N.C27
47
N.C26
46
N.C25
45
I/O 7
44
I/O 6
43
I/O 5
42
I/O 4
41
N.C24
40
N.C28
48
MT 29F2 G08 ABAEA
JP 9
He ade r2
C2 8
100nF
NAND FLASH
PC18
C2 9
1uF
+3V3
PC14
DG ND
R1 6
47K
R2 2
0R
DNP
R2 1 47K
R1 9 0R
DG ND
+3V3
C2 7
100nF
PC7
PC6
PC5
PC4
PC0
PC1
PC2
PC3
R1 5
47K
+3V3
PC10
PC9
PC16
PC17
+3V3
MN3
WE
18
N.C6
6
VCC
37
CE
9
RE
8
N.C11
20
WP
19
N.C5
5
N.C1
1
N.C2
2
N.C3
3
N.C4
4
N.C12
21
N.C13
22
N.C14
23
N.C15
24
R/B
7
N.C17
26
N.C18
27
N.C19
28
I/O 0
29
N.C21
34
N.C22
35
VSS
36
PRE
38
N.C23
39
VCC
12
VSS
13
ALE
17
N.C8
11
N.C7
10
N.C9
14
N.C10
15
CL E
16
N.C16
25
N.C20
33
I/O 1
30
I/O 3
32
I/O 2
31
N.C27
47
N.C26
46
N.C25
45
I/O 7
44
I/O 6
43
I/O 5
42
I/O 4
41
N.C24
40
N.C28
48
MT 29F2 G08 ABAEA
JP 9
He ade r2
C2 8
100nF
NAND FLASH
PC18
C2 9
1uF
+3V3
PC14
DG ND
R1 6
47K
R2 2
0R
DNP
R2 1 47K
R1 9 0R
DG ND
+3V3
C2 7
100nF
PC7
PC6
PC5
PC4
PC0
PC1
PC2
PC3
R1 5
47K
+3V3
PC10
PC9
PC16
PC17
+3V3
NOT POPULATED
DNP
XOUT32
XIN32
XIN32
XOUT32
PA7
PA8
XIN
XOUT
PB8
PB9
DGND
DGND
DGND
DGND
DGND
R3 DNPR3 DNP
R6 DNPR6 DNP
R9DNPR9DNP
R1 DNPR1 DNP
C3
20pF
C3
20pF
R4 0RR4 0R
C4
20pF
C4
20pF
R2
49.9R 1%
R2
49.9R 1%
Y1Y1
12
3
R8 DNPR8 DNP
R7DNPR7DNP
MN1MN1
PA7_RTS0_PWMH3
49
PA8_CTS0_AD12BTRG
48
PB8_XOUT
96
PB9 _XIN
97
R11
0R
R11
0R
Y212MHzY212MHz
C120pFC120pF
R10 DNPR10 DNP
Y3
32.768KHz
Y3
32.768KHz
12
3
R5 0RR5 0R
R12
0R
R12
0R
J1J1
1
2 3
54
C220pFC220pF
SAM4SD32