Pinout - rittme/nrfmicro GitHub Wiki
nRFMicro pinout
This pinout works for all boards. You can also copy values from custom_board.h (see jorne_ble.c macros implementation).
| nRFMicro | nice!nano | ProMicro | Left | Right | ProMicro | nice!nano | nRFMicro |
|---|---|---|---|---|---|---|---|
| P0.06 | P0.06 | D3 | PIN1 | PIN24 | RAW | RAW | RAW |
| P0.08 | P0.08 | D2 | PIN2 | PIN23 | GND | GND | GND |
| GND | GND | GND | PIN3 | PIN22 | RST | P0.18 | P0.18 |
| GND | GND | GND | PIN4 | PIN21 | VCC | VCC | VCC |
| P0.15 | P0.17 | D1 | PIN5 | PIN20 | F4 | P0.31 | P0.30 |
| P0.17 | P0.20 | D0 | PIN6 | PIN19 | F5 | P0.29 | P0.31 |
| P0.20 | P0.22 | D4 | PIN7 | PIN18 | F6 | P0.02 | P0.29 |
| P0.13 | P0.24 | C6 | PIN8 | PIN17 | F7 | P1.15 | P0.02 |
| P0.24 | P1.00 | D7 | PIN9 | PIN16 | B1 | P1.13 | P1.13 |
| P0.09 | P0.11 | E6 | PIN10 | PIN15 | B3 | P1.11 | P0.03 |
| P0.10 | P1.04 | B4 | PIN11 | PIN14 | B2 | P0.10 | P0.28 |
| P1.06 | P1.06 | B5 | PIN12 | PIN13 | B6 | P0.09 | P1.11 |
nRFMicro service pins
- P0.18 - RESET
- P1.10 - BLUE_LED (P0.15 on nice!nano)
- P1.09 - POWER_PIN (EXT_VCC control since 1.0, P0.13 on nice!nano) (1-off, 0-on)
- P0.26 - SWITCH_PIN (battery on/off state, from 0.03 to 1.1)
- P0.04 - BATTERY_PIN (analog battery voltage in mV, since 1.1, MUST BE analog pin, e.g. P0.04 is AIN2)
- P0.05 - PROG_PIN (charger prog pin, 1.2-1.3 only, set to 0 or internal 13K pull-down for charging)
- P0.07 - STAT_PIN (charger stat pin, 1.2 only, mostly unused)
nRFMicro unassigned (free) pins
These pins are available on the back side via through hole pads:
- P1.04
- P1.02
- P1.00
- P0.22
- P0.12
- P0.26 (free since 1.2)
- P0.07 (free since 1.3)
These pins are free on the top side of the module:
- P0.00 (XL1)
- P0.01 (XL2)
- P0.05 (free since 1.4)
So there are 10 free pins (including top side). Revision 1.4 may use P0.00 and P0.01 with the Crystal (you can desolder it).
These pins can be used to enter OTA mode (see Bootloader):
- P1.02 DFU (BUTTON_1)
- P0.12 FRST (BUTTON_2)
The underside unused pin P0.12 (apparently) cannot be used for I2C which has pull-down resistors. This pin is used by (PCA10056) bootloader. Doing so results in continuous looping of dfu bootloader mode. You might need to choose the appropriate bootloader that doesn't use this pin as FRST button (or maybe just don't use pull-down resistors). See Bootloader.
Low-drive pins
You're not supposed to use low drive pins for I2C protocol and RGB data (though I think I2C OLEDs are fine, they're sub-10kHz).
They are actually "standard drive, low frequency" pins. They can be found in the nRF52840 Product Specification (page 576):
Normal (high frequency) pins are:
- P0.00, P0.01, P0.26, P0.27, P0.04, P0.05, P0.06, P0.07, P0.08, P1.08, P1.09, P0.11, P0.12, P0.14, P0.16, P0.18, P0.19, P0.21, P0.23, P0.25, P0.13, P0.15, P0.17, P0.20, P0.22, P0.24, P1.00
Low drive (low frequency) pins are:
- P0.31, P0.29, P0.02, P1.15, P1.13, P1.10, P0.30, P0.28, P0.03, P1.14, P1.12, P1.11, P0.10, P0.09, P1.07, P1.06, P1.05, P1.04, P1.03, P1.02, P1.01
nRF52840 pin assignments
(Pins AIN0-AIN7 may be used as analog input.)
| Pin | Name | Function | Description | Recommended usage |
|---|---|---|---|---|
| A8 | P0.31 (AIN7) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A10 | P0.29 (AIN5) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A12 | P0.02 (AIN0) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A14 | P1.15 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A16 | P1.13 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A18 | Dec 02 | Power | 1.3 V regulator supply decoupling | |
| A20 | P1.10 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A22 | VDD | Power | Power supply | |
| A23 | XC2 | Analog input | Connection for 32 MHz crystal | |
| B1 | VDD | Power | Power supply | |
| B3 | DCC | Power | DC/DC converter output | |
| B5 | Dec 04 | Power | 1.3 V regulator supply decoupling | |
| B7 | VSS | Power | Ground | |
| B9 | P0.30 (AIN6) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B11 | P0.28 (AIN4) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B13 | P0.03 (AIN1) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B15 | P1.14 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B17 | P1.12 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B19 | P1.11 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B24 | XC1 | Analog input | Connection for 32 MHz crystal | |
| C1 | Dec 01 | Power | 1.1 V regulator supply decoupling | |
| D2 | P0.00 (XL1) | Digital I/O | General purpose I/O | |
| D23 | Dec 03 | Power | Power supply, decoupling | |
| E24 | Dec 06 | Power | 1.3 V regulator supply decoupling | |
| F2 | P0.01 (XL2) | Digital I/O | General purpose I/O | |
| F23 | VSS_PA | Power | Ground (radio supply) | |
| G1 | P0.26 | Digital I/O | General purpose I/O | |
| H2 | P0.27 | Digital I/O | General purpose I/O | |
| H23 | ANT | RF | Antenna connection | See Reference circuitry on page 583 |
| J1 | P0.04 (AIN2) | Digital I/O | General purpose I/O | |
| J24 | P0.10 (NFC2) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| K2 | P0.05 (AIN3) | Digital I/O | General purpose I/O | |
| L1 | P0.06 | Digital I/O | General purpose I/O | |
| L24 | P0.09 (NFC1) | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| M2 | P0.07 | Digital I/O | General purpose I/O | |
| N1 | P0.08 | Digital I/O | General purpose I/O | |
| N24 | Dec 05 | Power | 1.3 V regulator supply decoupling | |
| P2 | P1.08 | Digital I/O | General purpose I/O | |
| P23 | P1.07 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| R1 | P1.09 | Digital I/O | General purpose I/O | |
| R24 | P1.06 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| T2 | P0.11 | Digital I/O | General purpose I/O | |
| T23 | P1.05 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| U1 | P0.12 | Digital I/O | General purpose I/O | |
| U24 | P1.04 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| V23 | P1.03 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| W1 | VDD | Power | Power supply | |
| W24 | P1.02 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| Y2 | VDDH | Power | High voltage power supply | |
| Y23 | P1.01 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| AA24 | SWDCLK | Debug | Serial wire debug clock input | |
| AB2 | DCCH | Power | DC/DC converter output | |
| AC5 | DECUSB | Power | 3.3 V regulator supply decoupling | |
| AC9 | P0.14 | Digital I/O | General purpose I/O | |
| AC11 | P0.16 | Digital I/O | General purpose I/O | |
| AC13 | P0.18 nRESET | Digital I/O | General purpose I/O | QSPI/CSN |
| AC15 | P0.19 | Digital I/O | General purpose I/O | QSPI/SCK |
| AC17 | P0.21 | Digital I/O | General purpose I/O | QSPI |
| AC19 | P0.23 | Digital I/O | General purpose I/O | QSPI |
| AC21 | P0.25 | Digital I/O | General purpose I/O | |
| AC24 | SWDIO | Debug | Serial wire debug I/O | |
| AD2 | VBUS | Power | 5 V input for USB 3.3 V regulator | |
| AD4 | D- | Digital I/O | USB D- | USB |
| AD6 | D+ | Digital I/O | USB D+ | USB |
| AD8 | P0.13 | Digital I/O | General purpose I/O | |
| AD10 | P0.15 | Digital I/O | General purpose I/O | |
| AD12 | P0.17 | Digital I/O | General purpose I/O | |
| AD14 | VDD | Power | Power supply | |
| AD16 | P0.20 | Digital I/O | General purpose I/O | |
| AD18 | P0.22 (AD20) | Digital I/O | General purpose I/O | QSPI |
| AD22 | P1.00 | Digital I/O | General purpose I/O | QSPI |
| AD23 | VDD | Power | Power supply |
E73-2G4M08S1C Pinout
E73-2G4M08S1C Schematic
Alternative modules
See Components#alternative-modules for prices and links to IPEX antennas and stuff.
E73-2G4M08S1CX
E73-2G4M08S1CX schematic (with the IPEX antenna) is IDENTICAL. Does not need an extra XTAL or anything.
E73-2G4M08S1E
nRF52833-based (half the Flash, so no Python). Lacks pin 1.11 so it's not 100% compatible. Also no DCCH so no HV mode.
Other changes for nRF52833 module is that 1.10 is now 0.25 (blue led) and 1.13 is now 1.05 (standard gpio).
Since pad 1 - P1.11 is NC - Not Connected on E73-2G4M08S1E, you can add a connection from P1.04 to P1.11:
So it would still need PCB mod (or a wire jumper) and a firmware patch (there's also too little Flash). ZMK support was added just recently.
References
- https://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.1.pdf (nRF52840 Product Specification)