BL652 Development Kit
User Guide
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These series resistors provide the voltage drop as current flows through, activating the ESD protection
diode in the BL652 module.
Arduino RESET pin on development board (J33 pin3), is connected to BL652 nRESET pin (U5 pin22) via 0R
resistor (R43).
Arduino AREF is wired out from Arduino connector J32 to plated through holes on J22, which is next to the
Arduino shield connector J32, and is also wired to SIO_2 via R136 (560R). AREF is supplied by a Shield board
and is an input to the Arduino base board to indicate the maximum expected value of the analog signal. The
BL652 module does not support this function.
Arduino D2 pin wired out from Arduino connector J32 to plated through holes on J22, which is next to the
Arduino shield connector J32. Arduino D2 pin is not wired to BL652 (SIO_13) as series resistor R97 is not
fitted.
Table 8: Arduino connectors signals and mapping to BL652 SIO signals
J#
Arduino Connectors and Plated Through Holes (Test points)
Arduino signals
J30 BL652 pin plated holes for access
Arduino female header
J30.
J15 is plated through
holes for accessing
signals on J30
J29
Arduino female header
J31.
J16 is plated through
holes for accessing
signals on J30.
J17 Connects Arduino
A0 pin to Analog Input
Buffer (U3). J17
jumper NOT fitted
(default).
J32
J22
J18
J43
J24
J21
Arduino female header
J32.
J22 is plated through
holes for accessing signals
on J30.
J18 Connects SIO_22 (SPI
CS) to EEPROM (U2) or to
Arduino D10 (for use as
SPI Slave Select). J18
jumper NOT fitted
(default)
J43 Connects SIO_23 (SPI
MOSI) to Arduino D11.
J43 Jumper NOT fitted
(default).
D4
SIO_18
SIO_14
SIO_16
D5
D0_RX
D6
D1_TX
D7
D3
D0_RX
J15
NOPOP (PIN HEADER,2.54mm 1X8P)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D1_TX
R97
NOPOP (560R)
SIO_15
SIO_13
SIO_17
R129 560R
D4
D2
J30
HEADER,FEMALE,2.54mm,1X8P
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D0(RX)
D1(TX)
D2
D3
D4
D5
D6
D7
R130 560R
D5
R131 560R
D2
D6
D7
D3
R132 560R
R133 560R
A5
R50 560R
A5
A4
A3
A2
A1
A0
A2
A3
J16
NOPOP (PIN HEADER,2.54mm 1X6P)
1
1
2
2
3
3
4
4
5
5
6
6
A0
A4
R79 560R
A1
R80 560R
R92 560R
SIO_30
A0
A1
PIN HEADER,2.54mm 1X2P
J17
1
1
2
2
A2
A0_5V_IN
SIO_4
J31
HEADER,FEMALE,2.54mm,1X6P
1
1
2
2
3
3
4
4
5
5
6
6
A3
R93 560R
SIO_31
SIO_29
SIO_28
A4
A5
D12_MISO
SCL
Eeprom_MISO_SIO_24
GND
D9
D12_MISO
SIO_20
R39 560R
PIN HEADER,2.54mm 1X2P
J24
1
1
2
2
Eeprom_SCK_SIO_25
R40 560R
PIN HEADER,2.54mm 1X2P
J21
1
1
2
2
D8
R37
560R
R41 560R
R136 560R
R134 560R
Eeprom_CS_SIO_22
J22
NOPOP (PIN HEADER,2.54mm 1X10P)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
Eeprom_MOSI_SIO_23
SIO_2
D11_MOSI
SCL_ARD
R38 560R
SIO_22
R135 560R
SCL
D10_SS
SDA
SDA
D9
D10_SS
PIN HEADER,2.54mm 1X3P
J18
1
1
2
2
3
3
J32
HEADER,FEMALE,2.54mm,1X10P
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
PIN HEADER,2.54mm 1X2P
J43
1
1
2
2
AREF
SDA_ARD
D9
D11_MOSI
D8
GND
D13_SCLK
D13_SCLK
D8
D8
D9
D10(SS)
D11(MOSI)
D12(MISO)
D13(SCLK)
GND
AREF
SDA
SCL
AREF
AREF
R42 560R
SIO_19