Data Sheet

BMD-345 - Data sheet
UBX-19039908 - R07 Pin definition Page 12 of 36
3
0x40003000
SPI0
I2C0
4
0x40004000
SPI1
I2C1
Table 4: Peripherals with shared registers
2.2.1 BMD-301 to BMD-345 pad differences
Due to differences in the nRF52840 SoC used by the BMD-345, not all functions (such as SWO/TRACE
signals) are found on the same pins as on the BMD-301 (nRF52832). Particularly of note is the reset
pin function which on the BMD-345 is now available on P0.18 instead of P0.21 as on the BMD-301. To
maintain pin for pin compatibility of the reset signal, P0.18 and P0.21 have swapped pad locations on
the BMD-345 footprint. These differences are detailed in Table 5 below:
Pin
BMD-301 name
BMD-301 function
BMD-345 name
BMD-345 function
39
P0.21
GPIO/RESET
P0.18
GPIO/RESET
38
P0.20
GPIO/TRACECLK
P0.20
GPIO
36
P0.18
GPIO/TRACEDATA[0]/SWO
P0.21
GPIO
34
P0.16
GPIO/TRACEDATA[1]
P0.16
GPIO
33
P0.15
GPIO/TRACEDATA[2]
P0.15
GPIO
32
P0.14
GPIO/TRACEDATA[3]
P0.14
GPIO
23
P0.07
GPIO
P0.07
GPIO/TRACECLK
56
N/A
N/A
P1.00
GPIO/TRACEDATA[0]/SWO
28
P0.12
GPIO
P0.12
GPIO/TRACEDATA[1]
27
P0.11
GPIO
P0.11
GPIO/TRACEDATA[2]
52
N/A
N/A
P1.09
GPIO/TRACEDATA[3]
Table 5: BMD-301 to BMD-345 Pad differences