Laird BL654 User Manual page 16

Figure 8: SW11 on development board (showing default position)
USB_DETECTp
High
U24
1
SWDIO_EXT
1B0
15
SWDIO_BLE
1B1
5
SWDCLK_EXT
2B0
SWDCLK_BLE 3
2B1
9
nRESET_EXT
3B0
NOPOP (0R)
R131 7
nRESET_BLE
3B1
SB21
13
NOPOP (Solderbridge_Open)
4B0
2 1
SWO_EXT
2 1
11
4B1
SIO_32_SWO_BLE
6
GND
Dual DPDT,1.65V~4.45V
SW11
Slide SW,SMD/180d
GND
9 3
9 3
2
USB_DETECTp
2
8 1
8 1
GND
SW11 position2-1 High (Default USB2-BL654-SWD)
VDD_VSRC_nRF
JP1
1 2
SWDIO_EXT
3 4
SWDCLK_EXT
5 6
SWO_EXT
7 8
9 10
nRESET_EXT
NOPOP (PIN HEADER,1.27mm 2X5P)
GND
Figure 9: USB2 to SWD onboard circuitry routing via analog switch (U24)
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Pins connect
VDD_VSRC_nRF
1A-->1B1,
2A-->2B1,
C80
3A-->3B1,
0.1uF,16V
4A-->4B1
14
VCC
GND
16
OB_SWDIO
1A
4
OB_SWDCLK
2A
2
USB_DETECTp
1S
8
OB_RESET
3A
12
OB_SWO
4A
10
USB_DETECTp
2S
USB_DETECT
© Copyright 2018 Laird. All Rights Reserved
R138 VDD_VSRC_nRF
1M
Q4
N-PCH,¡Ó20V,0.8A/-0.56A
VDD_USB_MCU
GND
USB_DETECT
R140
15K
GND GND
16
R139
100K
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