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PAN9520 Wi-Fi Module
4 Power Supply
The following conditions must be met:
✓ The supply voltage is free of AC ripple voltage (for example from a battery or a low noise
regulator output). On the PAN9520 ETU, 10 µF decoupling capacitors on each supply
terminal are used for this purpose. If there is much noise on the power delivery network, a
filter network can be used intead.
✓ Decoupling capactitors/networks are placed close to the module to reduce inductive effects.
✓ The supply voltage is not exceedingly high or reversed. It should not carry noise and/or
spikes.
Power Terminals
There are three power terminals on the PAN9520. All are connected to the same 3.3 V power
net on the module.
Although the module could be powered via one terminal only, it is recommended to use all
terminals for distributing the currents. This will lead to a smaller voltage drop and thus a better
power integrity. Moreover, the supply's return currents will also be distributed, which reduces
the galvanic coupling from the power net to signals and vice versa.
I1
I2
I3
GND
NC
GND
H1
H2
H3
MTMS
NC
NC
G1
MTDI
GT4
F1
(Thermal GND)
MTDO
E1
MTCK
GT1
D1
(Thermal GND)
GND
C1
GPIO33
B1
B2
B3
GPIO34
GND
NC
A1
A2
A3
GND
GPIO35
GPIO36 GPIO37 GPIO38
Module Integration Guide Rev. 1.1
Power Terminals (red marked)
Top View
I4
I5
I6
I7
I8
V
V
GND
DAC 2
DAC 1
X32_N
DD
DD
H4
H5
H6
H7
H8
NC
NC
GPIO20 GPIO19
GND
GT5
(Thermal GND)
(Thermal GND)
GT2
(Thermal GND)
(Thermal GND)
B4
B5
B6
B7
B8
GND
NC
NC
V
V
DD
DD
A4
A5
A6
A7
A8
GND
U0TXD
U0RXD
I9
I10
I11
I12
I13
X32_P
GPIO0
GND
RF pad
H9
H10
H11
H12
H13
GND
GND
GPIO21
GND
GND
G11
G12
G13
GPIO14 GPIO13 GPIO12
GT6
F11
F12
F13
GPIO11
GND
GPIO10
E11
E12
E13
GPIO7
GPIO8
GPIO9
GT3
D11
D12
D13
GPIO5
GND
GPIO6
C11
C12
C13
GPIO2
GPIO3
GPIO4
B9
B10
B11
B12
B13
NC
NC
GPIO1
SPDT2
SPDT1
A9
A10
A11
A12
A13
GND
GPIO45 GPIO46 CHIP PU
V
DD
4 Power Supply
I14
GND
H14
GND
G14
GND
F14
GND
Antenna
E14
Keep out Area
GND
D14
GND
C14
GND
B14
GND
A14
GND
Page 13 of 44
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