CC2400_08 Datasheet, PDF (63/84 Pages) Texas Instruments – 2.4 GHz Low-Power RF Transceiver

CC2400
Bit
2:0
Field Name
TC_TXEND2PAOFF[2:0]
Reset R/W
4
R/W
Description
The time in µs from TX is stopped until the TX chain is turned off
and the state machine goes to the next state. The PKT signal will
then go low. This value must be greater than
TC_TXEND2SWITCH[2:0].
RESERVED (0x0C) - Reserved register containing spare control and status bits
Bit
15:5
4:0
Field Name
RES[15:5]
RES[4:0]
Reset R/W
0
R/W
0
R/W
Description
Reserved
Reserved
MANAND (0x0D) - Manual signal AND override register²
Bit
15
Field Name
VGA_RESET_N
14
LOCK_STATUS
13
BALUN_CTRL
12
RXTX
11
PRE_PD
10
PA_N_PD
9
PA_P_PD
8
DAC_LPF_PD
7
BIAS_PD
6
XOSC16M_PD
5
CHP_PD
4
FS_PD
Reset R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
1
R/W
Description
Overrides VGA_RESET_N used to reset the peak detectors in
the VGA in the RX chain.
Must be set to 0 during chip initialization.
Overrides the LOCK_STATUS top-level signal that indicates
whether VCO lock is achieved or not.
Overrides the BALUN_CTRL signal that controls whether the PA
should receive its required external biasing (1) or not (0) by
controlling the RX/TX output switch.
Overrides the RXTX signal that controls whether the LO buffers
(0) or PA buffers (1) should be used.
Power down of prescaler.
Power down of PA (negative path).
Power down of PA (positive path). When PA_N_PD=1 and
PA_P_PD=1 the up-conversion mixers are in powerdown.
Power down of TX DACs.
Power down control of global bias generator + XOSC clock
buffer.
Power down control of 16 MHz XOSC core.
Power down control of charge pump.
Power down control of VCO, I/Q generator, LO buffers.
2 _{For some important signals the value can be overridden manually by the MANAND and MANOVR registers. This is}
done as follows for the hypothetical important signal IS:
IS_USED = (IS * IS_AND_MASK) + IS_OR_MASK,
using Boolean notation.
The AND-mask and OR-mask for the important signals listed resides in the MANAND and MANOR registers,
respectively.
Examples:
• Writing 0xFFFE to MANAND and 0x0000 to MANOR will force LNAMIX_PD=0 whereas all other signals will be
unaffected.
• Writing 0xFFFF to MANAND and 0x0001 to MANOVR will force LNAMIX_PD=1 whereas all other signals will be
unaffected.
SWRS042A
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