RF64W datasheet(36/76 Pages) HOPE

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ADVANCED COMMUNICATIONS & SENSING

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RF64

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Table 15: Config vs. Data SPI Interface Selection

NSS_DATA

NSS_CONFIG

SPI Interface

Config

Data

Config

None

The following paragraphs describe how to use each of these interfaces.

5.2.1.2. SPI Config

 Write Register

To write a value into a configuration register the timing diagram below should be carefully followed by the uC.

The registe

r‟s new value is effective from the rising edge of NSS_CONFIG.

NSS_CONFIG (In)

SCK (In)

New value at

address A1

MOSI (In)

start

A(4) A(3) A(2) A(1)

Address = A1

A(0) stop

D(7) D(6) D(5) D(4) D(3) D(2) D(1) D(0)

Current value at

address A1*

MISO (Out)

D(7) D(6) D(5) D(4) D(3) D(2) D(1)

D(0)

* when writing the new value at address A1, the current content of A1 can be read by the uC.

(In)/(Out) refers to RF64 side

Figure 27: Write Register Sequence

Note that when writing more than one register successively, it is not compulsory to toggle NSS_CONFIG back high

between two write sequences. The bytes are alternatively considered as address and value. In this instance, all

new values will become effective on rising edge of NSS_CONFIG.

 Read Register

To read the value of a configuration register the timing diagram below should be carefully followed by the uC.

RF64W Datasheet(PDF) 36 Page - HOPE Microelectronics CO., Ltd.