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The packet is repeatedly retransmitted as

long as CE is high. TX_REUSE is set by the

SPI command REUSE_TX_PL, and is reset

by the SPI command W_TX_PAYLOAD

or FLUSH TX

TX_FULL

5

0

R

TX FIFO full flag

1: TX FIFO full; 0: Available locations in

TX FIFO

TX_EMPTY

4

1

R

TX FIFO empty flag.

1: TX FIFO empty

0: Data in TX FIFO

Reserved

3:2

00

R/W

Only '00' allowed

RX_FULL

1

0

R

RX FIFO full flag

1: RX FIFO full

0: Available locations in RX FIFO

RX_EMPTY

0

1

R

RX FIFO empty flag

1: RX FIFO empty

0: Data in RX FIFO

N/A

ACK_PLD

255:0

X

W

Written by separate SPI command ACK

packet payload to data pipe number PPP

given in SPI command

Used in RX mode only

Maximum three ACK packet payloads can

be pending. Payloads with same PPP are

handled first in first out.

N/A

TX_PLD

255:0

X

W

Written by separate SPI command TX data

pay-load register 1 - 32 bytes. This register

is implemented as a FIFO with three levels.

Used in TX mode only

N/A

RX_PLD

255:0

X

R

Read by separate SPI command

RX data payload register. 1 - 32 bytes.

This register is implemented as a FIFO with

three levels.

All RX channels share the same FIFO.

1C

DYNPD

Enable dynamic payload length

Reserved

7:6

0

R/W

Only „00‟ allowed

DPL_P5

5

0

R/W

Enable dynamic payload length data pipe 5.

(Requires EN_DPL and ENAA_P5)

DPL_P4

4

0

R/W

Enable dynamic payload length data pipe 4.

(Requires EN_DPL and ENAA_P4)

DPL_P3

3

0

R/W

Enable dynamic payload length data pipe 3.

(Requires EN_DPL and ENAA_P3)

DPL_P2

2

0

R/W

Enable dynamic payload length data pipe 2.

(Requires EN_DPL and ENAA_P2)

DPL_P1

1

0

R/W

Enable dynamic payload length data pipe 1.

(Requires EN_DPL and ENAA_P1)

DPL_P0

0

0

R/W

Enable dynamic payload length data pipe 0.

(Requires EN_DPL and ENAA_P0)

1D

FEATURE

R/W

Feature Register

Reserved

7:3

0

R/W

Only „00000‟ allowed

EN_DPL

2

0

R/W

Enables Dynamic Payload Length

EN_ACK_PAY

1

0

R/W

Enables Payload with ACK

EN_DYN_ACK

0

0

R/W

Enables the W_TX_PAYLOAD_NOACK

command

Note: Don’t write reserved registers and registers at other addresses in register bank 0

Table 4 Register Bank 0

RFM73P-S2 V2.0