Address
0x00
Description
The CONFIG register is used to enable and disable the three interrupts that the radio can generate, configure the cyclic redundancy check (CRC) code that is appended to packets, power the radio up and down, and switch the radio between receive and transmit mode.
Contents
This table is copied from the nRF24L01 product specification (page 53).
| Name |
Bit |
Reset Value |
Type | Description |
| Reserved | 7 | 0 | R/W | Only ‘0’ allowed |
| MASK_RX_DR | 6 | 0 | R/W | Mask interrupt caused by RX_DR 1: Interrupt not reflected on the IRQ pin 0: Reflect RX_DR as active low interrupt on the IRQ pin |
| MASK_TX_DS | 5 | 0 | R/W | Mask interrupt caused by TX_DS 1: Interrupt not reflected on the IRQ pin 0: Reflect TX_DS as active low interrupt on the IRQ pin |
| MASK_MAX_RT | 4 | 0 | R/W | Mask interrupt caused by MAX_RT 1: Interrupt not reflected on the IRQ pin 0: Reflect MAX_RT as active low interrupt on the IRQ pin |
| EN_CRC | 3 | 1 | R/W | Enable CRC. Forced high if one of the bits in the EN_AA is high |
| CRC0 | 2 | 0 | R/W | CRC encoding scheme ‘0’ – 1 byte ‘1’ – 2 bytes |
| PWR_UP | 1 | 0 | R/W | 1: POWER UP, 0:POWER DOWN |
| PRIM_RX | 0 | 0 | R/W | RX/TX control 1: PRX, 0: PTX |
Comments
The software driver sets this register to 0b00001111 by default.
The interrupts referred to above are described in the Firmware page.
The radio documentation often refers to a radio configured in receive mode as PRX (Primary Receiver) and to a radio configured in transmit mode as PTX (Primary Transmitter). The PRIM_RX bit determines whether the radio is in receive mode or transmit mode (normally it is set to 1, and set to 0 only while the radio is transmitting).