NRF7002-QFAA-R7 datasheet(17/61 Pages) NORDIC

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7 Quad Serial Peripheral Interface

The QSPI slave interface is compatible with the nRF52 and nRF53 Series QSPI master and SPI master.

The main features of the QSPI slave interface are:

• Single/quad SPI input/output

• Supports up to 32 MHz clock frequency

• Single and block mode read/write accesses

• On-the-fly encryption and decryption

7.1 QSPI commands

nRF7002 supports several QSPI commands.

Command

(byte)

RDSR (read

status register

RDSR1 (read

status register

RDSR2 (read

status register

WRSR2 (write

status register

CIPHER INIT

(Initialize

cipher)

FAST READ

(fast read

data)

READ4 (4

x I/O read

command)

PP (Page

program)

PP4 (Quad

page program)

1st byte

0x05

0x1F

0x2F

0x3F

0x4F

0x0B

0xEB

0x02

0x38

2nd byte

NONCE1

AD1

ADD (4) and

Dummy (4)

AD1

ADD (4)

3rd byte

NONCE2

AD2

Dummy (4)

AD2

4th byte

NONCE3

AD3

5th byte

NONCE4

Dummy

Action

To read out

the values of

status register

To read out

the values of

status register

To read out

the values of

status register

To write in

the values of

status register

To enable the

steam cipher

and initialize

the NONCE

n bytes read

out until SS

goes high

n bytes read

out by 4 x I/O

until SS goes

high

to program the

selected page

Quad input to

program the

selected page

Table 3: QSPI commands

For RDSR, RDSR1, RDSR2, FAST_READ, and READ4, the shifted-in instruction sequence is followed by a

data-out sequence. After any bit of data being shifted out, the SS can be high.

For CIPHER_INIT, PP, and PP4, the SS must go high exactly at the 4th byte (32 bits) boundary or the value

will not be stored.

For WRSR2, the SS must go high exactly at the 1st byte (8 bits) boundary or the value will not be stored.

The following figure shows the timing diagram for the RDSR command. The other commands that access

status registers have the same format but with a different 1st byte.

4486_184 v1.0

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