參數(shù)資料
型號: MRF24J40
廠商: Microchip Technology Inc.
英文描述: IEEE 802.15.4⑩ 2.4 GHz RF Transceiver
中文描述: IEEE 802.15.4標(biāo)準(zhǔn)⑩2.4 GHz射頻收發(fā)器
文件頁數(shù): 16/66頁
文件大小: 748K
代理商: MRF24J40
MRF24J40
DS39776A-page 14
Advance Information
2006 Microchip Technology Inc.
4.2
Short Address Register Interface
4.2.1
READING SHORT ADDRESS
REGISTERS
The short address space is accessed by sending a ‘
0
as the first bit of the SPI transfer. The following 6 bits
are the address of the target register. The final bit of the
first byte is a ‘
0
‘ to indicate that the command is a read.
On the next clock edge of SCK, the Most Significant bit
of the register will shift out, followed by the rest of the
bits.
FIGURE 4-3:
SHORT ADDRESS READ
EXAMPLE 4-1:
SHORT ADDRESS READ EXAMPLE
SCK
SDI
SDO
CS
A5
A4
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
X
0
0
BYTE GetShortRAMAddress(BYTE address)
{
BYTE toReturn;
CSn = 0;
SPIPut((address<<1)&0b01111110);
toReturn = SPIGet();
CSn = 1;
return toReturn;
}
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