Data Sheet

BMD-341 - Data sheet
UBX-19033643 - R03 Pin definition Page 13 of 36
2.3.1 BMD-300/301/330/360 to BMD-341 pad differences
Due to changes in the nRF52840 SoC used by the BMD-341, not all functions (such as SWO/TRACE
signals) are found on the same pins as on the BMD-300/301/330/360. Particularly of note is the reset
pin function which on the BMD-341 is now available on P0.18 instead of P0.21 as on the
BMD-300/301/330/360. To maintain pin for pin compatibility of the reset signal, P0.18 and P0.21
have swapped pad locations on the BMD-341 footprint. These differences are detailed in Table 4
below:
Pin
BMD-300/301
Name
BMD-300/301
Function
BMD-341
Name
BMD-341
Function
39
P0.21
GPIO/RESET_N
P0.18
GPIO/RESET_N
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 4: BMD-300/301/330 to BMD-341 Pad differences
2.3.2 BMD-300/301/330/360 to BMD-341 design migration
Existing designs incorporating the BMD-300, BMD-301, BMD-330 or BMD-360 module can be
migrated over to the BMD-341 with the addition of a single footprint pad for VCCH (pin 65). This
migration option is only suitable for applications that do not require the new USB interface, additional
GPIO, or higher supply voltage functionality. The VCCH pad must be present and electrically
connected to the same supply as VCC for the module to operate correctly. Vias underneath the
BMD-341 should be tented to avoid shorts to unused module pads. Firmware written for the
BMD-300/301/330/360 can generally be ported to the BMD-341 with minimal effort. See the Nordic
Semiconductor SDK documentation for details.
Figure 5: BMD-300 to BMD-341 Migration Example
New Pad VCCH:
Connect to VCC