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| CC11X1-Q1 Datasheet, PDF (45/94 Pages) Texas Instruments – Low-Power Sub-1-GHz Fractional-N UHF Device Family for Automotive | |||
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CC11x1-Q1
SWRS076B â 11-07-22-013 - APRIL 2009 â REVISED APRIL 2010
MANCAL
3,4,5
CAL_COMPLETE
SIDLE
SPWD | SWOR
SCAL
IDLE
1
CSn = 0 | WOR
SXOFF
CSn = 0
SRX | STX | SFSTXON | WOR
SLEEP
0
XOFF
2
FS_WAKEUP
6,7
FS_AUTOCAL = 01
&
SRX | STX | SFSTXON | WOR
FS_AUTOCAL = 00 | 10 | 11
&
SRX | STX | SFSTXON | WOR
CALIBRATE
8
FSTXON
18
SFSTXON
SETTLING
9,10,11
CAL_COMPLETE
STX
SRX | WOR
TXOFF_MODE = 10
STX
SRX
TXOFF_MODE=01
SFSTXON | RXOFF_MODE = 01
TX
19,20
STX | RXOFF_MODE = 10
RXTX_SETTLING
21
( STX | SFSTXON ) & CCA
|
RXOFF_MODE = 01 | 10
RX
13,14,15
RXOFF_MODE = 11
SRX | TXOFF_MODE = 11
TXRX_SETTLING
16
TXFIFO_UNDERFLOW
TXOFF_MODE = 00
&
FS_AUTOCAL = 10 | 11
TX_UNDERFLOW
22
TXOFF_MODE = 00
&
FS_AUTOCAL = 00 | 01
CALIBRATE
12
RXOFF_MODE = 00
&
FS_AUTOCAL = 10 | 11
RXFIFO_OVERFLOW
RXOFF_MODE = 00
&
FS_AUTOCAL = 00 | 01
RX_OVERFLOW
17
SFTX
IDLE
1
SFRX
Figure 3-15. Complete Radio-Control State Diagram
3.15.1 Power-On Start-Up Sequence
When the power supply is turned on, the system must be reset. This is achieved by one of the two
sequences described below, i.e. automatic power-on reset (POR) or manual reset.
After the automatic power-on reset or manual reset it is also recommended to change the signal that is
output on the GDO0 pin. The default setting is to output a clock signal with a frequency of
CLK_XOSC/192, but to optimize performance in TX and RX an alternative GDO setting should be
selected from the settings found in Table 3-17.
3.15.1.1 Automatic POR
A power-on reset circuit is included in the CC11x1-Q1. The minimum requirements stated in Section 2.14
must be followed for the power-on reset to function properly. The internal power-up sequence is
completed when CHIP_RDYn goes low. CHIP_RDYn is observed on the SO pin after CS is pulled low.
See Section 3.6.1 for more details on CHIP_RDYn.
Copyright © 2009â2010, Texas Instruments Incorporated
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