xe1205 Semtech Corporation, xe1205 Datasheet - Page 27

• Manufacturer Part Number: xe1205
• Description: Low-power, High Link Budget Integrated Uhf Transceiver
• Manufacturer: Semtech Corporation

Figure 17 shows the write operation during transmit.
Figure 18 shows the read operation in receive mode.
Note that it is necessary to toggle NSS_DATA signal back to high and then back to low between each
transmitted and received byte.
© Semtech 2007
SCK
MOSI
MISO
NSS_DATA
SCK
MOSI
MISO
NSS_DATA
HZ
HZ
D1(7)
x
D1(7)
1
1
x
D1(6)
D1(6) D1(5)
x
2
x
2
D1(5) D1(4)
x
3
x
3
D1(4) D1(3)
Figure 17 Writing 2 bytes in transmitter mode
Byte 1 to
Byte 1 to
4
x
4
x
read
read
x
Figure 18: Reading 2 bytes in receive mode.
D1(3) D1(2) D1(1)
5
x
5
x
D1(2) D1(1)
6
6
x
x
7
x
7
x
D1(0)
D1(0)
8
8
x
x
27
x
HZ
HZ
D2(7)
D2(7) D2(6) D2(5)
x
1
1
D2(6) D2(5)
2
2
x
x
3
x
3
x
D2(4)
D2(4)
4
x
4
x
to read
to read
Byte 2
Byte 2
D2(3)
D2(3) D2(2) D2(1)
5
x
5
x
D2(2) D2(1)
6
x
6
x
XE1205
7
x
7
x
www.semtech.com
D2(0)
D2(0)
8
x
8
x
x
HZ
HZ