Laird BL654 - Page 16

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16
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Figure 8: SW11 on development board (showing default position)
Figure 9: USB2 to SWD onboard circuitry routing via analog switch (U24)
OB_SWDIO
C80
0.1uF,16V
GND
OB_SWDCLK
SB21
NOPOP (Solderbridge_Open)
1
1
2
2
USB_DETECTp
VDD_VSRC_nRF
USB_DETECTp Pins connect
High 1A-->1B1,
2A-->2B1,
3A-->3B1,
4A-->4B1
SWDIO_EXT
SWDIO_BLE
SIO_32_SWO_BLE
nRESET_EXT
R131
NOPOP (0R)
U24
Dual DPDT,1.65V~4.45V
1B0
1
1B1
15
2B0
5
2B1
3
1A
16
2A
4
1S
2
3B0
9
3B1
7
4B0
13
4B1
11
3A
8
4A
12
2S
10
GND
6
VCC
14
OB_RESET
SWDCLK_BLE
SWDCLK_EXT
OB_SWO
USB_DETECTp
SWO_EXT
nRESET_BLE
USB_DETECT
SW11 position2-1 High (Default USB2-BL654-SWD)
SW11
Slide SW,SMD/180d
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
GND
GND
USB_DETECTp
GND GND
R138
1M
Q4
N-PCH,¡Ó20V,0.8A/-0.56A
S1
1
G1
2
D2
3
S2
4
G2
5
D1
6
R139
100KR140
15K
GND
VDD_VSRC_nRF
VDD_USB_MCU
USB_DETECT
GND
SWDIO_EXT
SWDCLK_EXT
JP1
NOPOP (PIN HEADER,1.27mm 2X5P)
1 2
3 4
5 6
7 8
9 10
nRESET_EXT
SWO_EXT
VDD_VSRC_nRF