CC2400 Chipcon AS, CC2400 Datasheet - Page 57

• Manufacturer Part Number: CC2400
• Description: 2.4 GHz RF Transceiver
• Manufacturer: Chipcon AS

2:0
RESERVED (0x0C) - Reserved register containing spare control and status bits
15:5
MANAND (0x0D) - Manual signal AND override register
15
14
13
12
11
10
9
8
7
6
5
4
3
2
done as follows for the hypothetical important signal
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:
•
•
Chipcon AS
4:0
For some important signals the value can be overridden manually by the
Bit
Bit
Bit
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.
Field Name
TC_TXEND2PAOFF[2:0]
Field Name
RES[15:5]
RES[4:0]
Field Name
VGA_RESET_N
LOCK_STATUS
BALUN_CTRL
RXTX
PRE_PD
PA_N_PD
PA_P_PD
DAC_LPF_PD
BIAS_PD
XOSC16M_PD
CHP_PD
FS_PD
ADC_PD
SmartRF
®
CC2400 PRELIMINARY Datasheet (rev. 1.1), 2003-10-02
Reset
4
Reset
0
0
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
IS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
:
SmartRF
Description
The time in us from the last bit is sent to the modulator until the
PA is turned off.
Description
Reserved
Reserved
Description
Overrides the 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.
Power down control of the ADCs.
2
MANAND
and
®
MANOVR
CC2400
registers. This is
Page 57 of 73