ATA5823 ATMEL Corporation, ATA5823 Datasheet - Page 29

• Manufacturer Part Number: ATA5823
• Description: Uhf Ask/fsk Transceiver Ata5823 Ata5824
• Manufacturer: ATMEL Corporation

Figure 9-2.
4829D–RKE–06/06
XTO Block Diagram
8 pF
S
1
In IDLE mode and during sleep mode (RX_Polling) the switches
S
1
and S
XTAL1
To save current in IDLE and Sleep mode, the load capacitors partially are switched off in this
modes with S
It is recommended to use a crystal with C
C
Lower values of C
higher values of C
To find the right values used in the control registers 2 and 3 (see
Table 12-10 on page
determine the right content, the frequency at pin CLK, as well as the output frequency at
RF_OUT in ASK mode can be measured, than the FREQ value can be calculated according to
Table 9-1
10 pF
2
0
are open.
= 1.0 pF to 2.2 pF.
C
L1
so that f
1
C
L2
and S
XTAL2
m
m
RF
(up to 15 fF) can also be used, this has only little influence to pulling.
can be used, this increases slightly the start-up time. Lower values of C
is exactly the desired radio frequency.
2
10 pF
39) the relationship between f
seen in
Figure 9-2 on page
8 pF
S
2
f
XTO
Baud1
Amplitude
m
detector
Divider
Divider
Divider
= 3.0 fF to 7.0 fF, C
Baud0
/16
/16
/3
/1
/2
/4
/8
29.
XLim
XTO
register 3)
CLK_EN
(Control
and the f
CLK
ATA5823/ATA5824
f
f
DCLK
XDCLK
&
register 3)
CLK_ON
(Control
RF
Table 12-7 on page 38
LN
is shown in
= 9 pF, R
(from power
(to reset logic)
DVCC_OK
supply)
XTO_OK
m
Table
< 120
9-1. To
and
and
0
29
or