Laird BL654 User Manual page 23

Table 8: Module pins exposed by plated through holes
Plated Through Holes or Header Connector
J4
SIO_00_Header
4
SIO_01_Header
NOPOP (PIN HEADER,2.54mm 1X2P)
J44
C71
12pF, 50V
2
XL1
GND Y 3
32.768KHz,20ppm,9pF
C70
10pF,50V
2
XL2
GND
J4
NOPOP (PIN HEADER,2.54mm 1X10P)
7
SIO_23
SIO_21
SIO_22
SIO_19
SIO_20
SIO_17
SIO_16
SIO_15
SIO_13
SIO_14
J2 J26
1
SIO_13
6
1 2
PIN HEADER,2.54mm 1X2P
J37
J3
1
SIO_14
1 2
7
PIN HEADER,2.54mm 1X2P
J45
1
SIO_15
1 2
J4
5
PIN HEADER,2.54mm 1X2P
J39
1
SIO_16
1 2
J3
PIN HEADER,2.54mm 1X2P
9
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SB9 NOPOP (Solderbridge_Open)
1
SIO_00
0R R127
2 1
SB8 NOPOP (Solderbridge_Open)
1
SIO_01
2 1
0R R128
J47
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
2
LED1
2
LED2
2
LED3
2
LED4
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BL654 Module Signals Exposed
BL654 pin plated holes for access:
▪
SI0_ 00
▪
SI0_ 01
J44 connects to SIO_00 and SIO_01 via 0R
resistors R127 and R128.
By default, the optional external 32.768 kHz
SIO_00_Header
crystal circuit is not connected to BL654 as
SB8 and SB9 are open.
SIO_01_Header
BL654 pin plated holes for access:
▪
SI0_ 23
▪
SI0_ 21
▪
SI0_ 22
▪
SI0_ 19
▪
SI0_ 20
▪
SI0_ 17
▪
SI0_ 16
▪
SI0_ 15
▪
SI0_ 13
▪
SI0_ 14
J26 Connects SIO_35 to LED1
J26 jumper fitted (default).
J37 Connects SIO_14 to LED2
J37 jumper fitted (default).
J45 Connects SIO_15 to LED3
J45 jumper fitted (default).
J39 Connects SIO_16 to LED4
J39 jumper fitted (default).
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