RF64 Datasheet, PDF (36/76 Pages) List of Unclassifed Manufacturers – ADVANCED COMMUNICATIONS & SENSING

RF64
ADVANCED COMMUNICATIONS & SENSING
Table 15: Config vs. Data SPI Interface Selection
NSS_DATA
0
0
1
1
NSS_CONFIG
0
1
0
1
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 register‟s new value is effective from the rising edge of NSS_CONFIG.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
NSS_CONFIG (In)
SCK (In)
MOSI (In)
New value at
address A1
start rw
A(4) A(3) A(2) A(1) A(0) stop D(7) D(6) D(5) D(4) D(3) D(2) D(1) D(0)
Address = A1
Current value at
address A1*
MISO (Out) HZ x ^x x x x x x x D(7) D(6) D(5) D(4) D(3) D(2) D(1) D(0) HZ
* 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.
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