nrf52820 HIC
January 8, 2022 ยท View on GitHub
Based on Nordic nRF52820 and nRF52833:
- Cortex-M4 64 MHz
- 256 KB Flash
- 32 KB RAM
- Full-speed USB 2.0 device controller: up to 9 bi-directional endpoints including EP0 (*)
- QFN40 packaging
(*) "Endpoints: 2 control (1 IN, 1 OUT) [...] 14 bulk/interrupt (7 IN, 7 OUT) [...] 2 isochronous (1 IN, 1 OUT)" (source: Datasheet)
Memory Map
| Region | Size | Start | End |
|---|---|---|---|
| Flash | 128 KB | 0x0000_0000 | 0x0002_0000 |
| SRAM | 32 KB | 0x2000_0000 | 0x2000_8000 |
Bootloader size is 32 KB Limiting flash usage to 128 KB
DAPLink default pin assignment
nrf52820
| Signal | I/O | Symbol | Pin |
|---|---|---|---|
| SWD | |||
| SWCLK | O | P0.01 | 3 |
| SWDIO | I/O | P0.00 | 2 |
| UART | |||
| UART TX | I | P0.29 | 32 |
| UART RX | O | P0.08 | 31 |
| Button | |||
| F-RST But. | I | P0.06 | 6 |
| LEDs | |||
| HID LED | O | P0.14 | 14 |
| MSD LED | O | P0.14 | 14 |
| CDC LED | O | P0.14 | 14 |
| POWER LED | O | P0.15 | 15 |
Note:
- LEDs have active state high.
nrf52833
| Signal | I/O | Symbol | Pin |
|---|---|---|---|
| SWD | |||
| SWCLK | O | P0.01 | 3 |
| SWDIO | I/O | P0.00 | 2 |
| UART | |||
| UART TX | I | P0.02 | 32 |
| UART RX | O | P0.03 | 31 |
| Button | |||
| F-RST But. | I | P1.09 | 6 |
| LEDs | |||
| HID LED | O | P0.15 | 14 |
| MSD LED | O | P0.15 | 14 |
| CDC LED | O | P0.15 | 14 |
| POWER LED | O | P0.17 | 15 |
Note:
- LEDs have active state high.