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ATA5423-PLSW Datasheet(PDF) 27 Page - ATMEL Corporation

Part # ATA5423-PLSW
Description  UHF ASK/FSK Transceiver
PDF  100 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATA5423-PLSW Datasheet(HTML) 27 Page - ATMEL Corporation

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27
4841D–WIRE–10/07
ATA5423/ATA5425/ATA5428/ATA5429
Figure 4-2.
XTO Block Diagram
To find the right values used in control registers 2 and 3 (see Table 7-7 and Table 7-10), the
relationship between f
XTO and the fRF is shown in Table 4-1 on page 28. To determine the right
content, the frequency at pin CLK as well as the output frequency at RF_OUT in ASK mode can
be measured, then the FREQ value can be calculated according to Table 4-1 on page 28 so that
f
RF is exactly the desired radio frequency.
8 pF
8 pF
XTAL1
Divider
/16
CLK_ON
(control
register 3)
VSOUT_OK
(from power supply)
DVCC_OK
(from power supply)
Baud1
In IDLE mode and during Sleep mode (RX_Polling)
the switches S1 and S2 are open.
XLim
Baud0
&
Divider
/3
XTO_OK
(to reset logic)
Divider
/1
/2
/4
/8
/16
10 pF
10 pF
Amplitude
detector
S2
S1
fXDCLK
XTAL2
CLK
CL2
CL1
fXTO
fDCLK



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