参数资料
型号: SM1212E433
厂商: Semtech
文件页数: 36/77页
文件大小: 0K
描述: RF EVAL FOR SX1212 433MHZ ISM
标准包装: 1
类型: 收发器,ISM
频率: 433MHz
适用于相关产品: SX1212E
已供物品: 模块,天线,电源,软件
SX1212
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)
New value at
address A1
MOSI (In)
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)
Current value at
Address = A1
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 SX1212 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.
Rev 2 – June 18th, 2009
Page 36 of 77
www.semtech.com
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