Nordic 3 - Programming Interface

6 Hardware description: Smart Remote 3 nRF52 product example
Doc. ID 4374_139 v1.1
Page 50
D1
1PS79SB30.115
VDD
SB2
+
BatP1
AA
+
BatN1
AA
Battery
Figure 37: Battery schematic
There is a power switch on the Smart Remote 3 that is connected to most of the circuits. The nRF chip controls
the two transistors, which will turn on or off power to the microphones and to the motion tracking device. See
Figure 38: Power on/off switch schematic on page 50. The low power accelerometer is always powered.
VDD
VCC
C19
100nF
+
C16
100
µ
F
C18
100nF
C17
22
µ
F
Q4A
FDG6304P
Q4B
FDG6304P
R9
0R
V
I
O
_
P
D
M
_
S
W
VIO_PDM
C25
10
µ
F
VIO_GYRO
C26
10
µ
F
GND
GND
V
I
O_
G
Y
R
O
_
S
W
Figure 38: Power on/off switch schematic
6.3.6 Programming interface
A connector for the ARM SWD interface is included on the product example for easy firmware upgrade
purposes.
When this interface is connected to a compatible programmer, firmware upgrades can be made directly on
the board. The interface is found on the 10 pin connector P1, see the figure below.