BK2425WD datasheet(12/30 Pages) ETC2

12 / 30 page

BK2425

Revision 1.0

Proprietary and Confidential

Page 12 of 30

are allowed to assert the IRQ pin. By setting

one of the MASK bits high, the corresponding

IRQ source is disabled. By default all IRQ

sources are enabled.

The 3 bit pipe information in the STATUS

low transition. If the STATUS register is read

during an IRQ pin high to low transition, the

pipe information is unreliable.

6.3

SPI Interface

6.3.1

SPI Command

The SPI commands are shown in Table 3.

Every new command must be started by a high

to low transition on CSN.

In parallel to the SPI command word applied

on the MOSI pin, the STATUS register is

shifted serially out on the MISO pin.

The serial shifting SPI commands is in the

following format:



<Command word: MSB bit to LSB bit

(one byte)>



<Data bytes: LSB byte to MSB byte,

MSB bit in each byte first> for all

registers at bank 0 and register 9 to



<Data bytes: MSB byte to LSB byte,

MSB bit in each byte first> for register 0

to register 8 at bank 1

Command name

Command

word

(binary)

# Data

bytes

Operation

R_REGISTER

000A AAAA

1 to 5

LSB byte first

Read command and status registers. AAAAA =

5 bit Register Map Address

W_REGISTER

001A AAAA

1 to 5

LSB byte first

Write command and status registers. AAAAA = 5

bit Register Map Address

Executable in power down or standby modes only.

R_RX_PAYLOAD

0110 0001

1 to 32

LSB byte first

Read RX-payload: 1 – 32 bytes. A read operation

always starts at byte 0. Payload is deleted from FIFO

after it is read. Used in RX mode.

W_TX_PAYLOAD

1010 0000

1 to 32

LSB byte first

Write TX-payload: 1 – 32 bytes. A write operation

always starts at byte 0 used in TX payload.

FLUSH_TX

1110 0001

Flush TX FIFO, used in TX mode

FLUSH_RX

1110 0010

Flush RX FIFO, used in RX mode

Should not be executed during transmission of

acknowledge, that is, acknowledge package will not

be completed.

REUSE_TX_PL

1110 0011

Used for a PTX device

Reuse last transmitted payload. Packets are repeatedly

retransmitted as long as CE is high.

TX payload reuse is active until

W_TX_PAYLOAD or FLUSH TX is executed. TX

payload reuse must not be activated or deactivated

during package transmission

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