BC9824 datasheet(10/22 Pages) HOLTEK

10 / 22 page

Rev. 1.00

October 20, 2015

BC9824

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

ACTIVATE

0101 0000

This write command followed by data 0x73 activates the

following features:

• R_RX_PL_WID

• W_ACK_PAYLOAD

• W_TX_PAYLOAD_NOACK

A new ACTIVATE command with the same data

deactivates them again. This is executable in power

down or stand by modes only.

The R_RX_PL_WID, W_ACK_PAYLOAD, and

W_TX_PAYLOAD_NOACK features registers are initially

in a deactivated state; a write has no effect, a read only

results in zeros on MISO. To activate these registers,

use the ACTIVATE command followed by data 0x73.

Then they can be accessed as any other register. Use

the same command and data to deactivate the registers

again.

This write command followed by data 0x53 toggles the

be read out from REG7 [7]

R_RX_PL_WID

0110 0000

Read RX-payload width for the top R_RX_PAYLOAD in

the RX FIFO.

W_ACK_

PAYLOAD

1010 1PPP

1 to 32

LSB byte first

Used in RX mode.

Write Payload to be transmitted together with

ACK packet on PIPE PPP. (PPP valid in the range from

000 to 101). Maximum three ACK packet payloads can

be pending. Payloads with same PPP are handled using

first in - first out principle. Write payload: 1– 32 bytes. A

write operation always starts at byte 0.

W_TX_PAYLOAD_

ACK

1011 0000

1 to 32

LSB byte first

Used in TX mode. Disables AUTOACK on this specific

packet.

NOP

1111 1111

No Operation. Might be used to read the STATUS

SPI Command

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