https://www.lairdconnect.com/wireless-
modules/bluetooth-modules
25
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Plated Through Holes or Header Connector
BL654PA Module Signals Exposed
Jumper on J35 (Route to Atmel)
Routes SIO_05 (RTS) to IMCU_CTS
Routes SIO_06 (TX) to IMCU_RxD
Routes SIO_07 (CTS) to IMCU_RTS
Routes SIO_08 (RX) to IMCU_TxD
J12
Connects SIO_35 (nAutoRUN) to FTDI DTR
Default jumper fitted in J12
pin 2-1.
J5
SIO_ 02 (for VSP capability)
Can be used to pull-up SIO_02 to VDD_nRF_SW
Default: No Jumper fitted on J5 SIO_02
J17
J21
J17 Routes SIO_27 (I2C SCL) to RTC_SCL
device
J17 pin 2-1 jumper NOT fitted (default).
J21 Routes SIO_26 (I2C_SDA) to RTC_SDA
device
J21 pin 2-1 jumper NOT fitted (default).
J6
J6 routes SIO_03 to Temp Sensor
J6 pin 2-1 jumper NOT fitted (default)
IMCU_CTS
IMCU_RxD
C8
0.1uF,16V
GND
IMCU_RTS
IMCU_TxD
USB_CTS
Module_CTS
VDD_VSRC_nRF
R7
10K
R6 0R
R9 0R
R12 0R
R21 0R
USB_RX
R19
10K
PIN HEADER,2.54mm 1X2P
J35
1
1
2
2
USB_DETECT Pins connect
High 1A-->1B1,
2A-->2B1,
3A-->3B1,
4A-->4B1
Module_RX
GND
SIO_08
VDD_VSRC_nRF
SIO_05
SIO_06
SIO_07
VDD_VSRC_nRF
USB_TX
USB_RTS
VDD_VSRC_nRF
U15
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
Module_RTS
Module_TX
R2
10K
GND
R3
10K
R10
10K
R11
10K
R25
NOPOP (10K)
USB_DTR
GND
VDD_VSRC_nRF
PIN HEADER,2.54mm 1X3P
J12
1
1
2
2
3
3
n_Autorun /
module_DSR
Module_DSR
Develop: Jumper J12 pin2-1 (default)
nAUTORUN: Jumper J12 pin2-3
SIO_35
VDD_nRF_SW
PIN HEADER,2.54mm 1X2P
J5
1
1
2
2
VSP on SIO_02
SIO_02
R14
560R
R108
0R
PIN HEADER,2.54mm 1X2P
J21
1
1
2
2
SIO_27
PIN HEADER,2.54mm 1X2P
J17
1
1
2
2
SIO_26
R107
0R
RTC_SDA
RTC_SCL
SIO_03
PIN HEADER,2.54mm 1X2P
J6
1
1
2
2
Temp_Sens
Summary of Contents for BL654PA
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