3
ATAB5749 [APPLICATION NOTE]
9138B–AUTO–07/15
Figure 1-2.
Schematic of the Demo Board ATAB5749
S1
S2
1
2
3
4
1
2
3
4
S3
1
2
3
4
B1
B2
B3
B4
B5
B6
B7
B8
A1
A2
A3
A4
A5
A6
A7
A8
X1
-
+
2
1
VS
GND
XTO2
XTO1
SCK
SDIN_TXDIN
ANT1
6
7
8
9
4
5
3
2
EN
ADC7
AREF
PB5
AVCC
ADC6
GND21
PC0
PC1
19
20
17
18
23
24
21
22
6
5
8
7
2
1
4
3
GND3
GND5
PB7
PB6
VCC6
VCC4
PD4
PD3
PB4
PB3
PB2
PD7
PD6
PD5
11
12
9
10
15
16
13
14
30
29
32
31
26
25
28
27
PB0
PB1
PC2
PC3
PC4
PD0
PD1
PD2
PC6
PC5
CLK
10
1
ANT2
U1
BA2032SM
C1
C8
C7
C9
C10
GND1
CLK1
STXDIN1
EN1
SCK1
VS1
C11 C12
BR5
BR3
BR4
BR1
R2
BR2
R3
R4
D1
D2
PB2_ENABLE
PD1_SDI
B6
B8
B6
A7
MOSI
MISO
A1
A1
PD1_SDI
B8
MISO
MOSI
PB2_ENABLE
B7
SCK
SCK
PD4_SCK
X3
L2
Loop Antenna
w = 1 mm
25 mm x 25 mm
L1
C5
C14
C13
C6
C3
C2
Q1
Quarz
VS
VS
VS
VS
X5
MOSI
PD4_SCK
SCK
VS
A7
X4
VS
B7
Q1a
Quarz
