CC2510_15 Datasheet, PDF (201/245 Pages) Texas Instruments – Low-Power SoC (System-on-Chip) with MCU, Memory,2.4 GHz RF Transceiver, and USB Controller

CC2511F8 - Not Recommended for New Designs
CC2510Fx / CC2511Fx
Description
Idle to RX, no calibration
Idle to RX, with calibration²³
Idle to TX/FSTXON, no calibration
Idle to TX/FSTXON, with calibration²³
TX to RX switch
RX to TX switch
TX to IDLE, no calibration
TX to IDLE, with calibration²³
RX to IDLE, no calibration
RX to IDLE, with calibration²³
Manual calibration²³
Transmission Time as a
function of fRef and/or fSymbol²²
1953/fSys
20768/fSys
1954/fSys
20768/fSys
782/fSys + 0.25/fSymbol
782/fSys
~0.25/fSymbol
~0.25/fSymbol +18815/fSys
2/fSys
18817/fSys
19098/fSys
Transition Time [μs]
fRef = 26 MHz fRef = 24 MHz
75.1
81.4
799
865
75.2
81.4
799
865
31.1
33.6
30.1
32.6
~1
~1
725
785
0.1
0.1
724
784
735
796
Table 71: State Transition Timing
13.12.3 RX Termination Timer
CC2510Fx/CC2511Fx has optional functions for
automatic termination of RX after a
programmable time. The termination timer
starts when in RX state. The timeout is
programmable with the MCSM2.RX_TIME
setting. When the timer expires, the radio
controller will check the condition for staying in
RX; if the condition is not met, RX will
terminate.
The programmable conditions are:
• MCSM2.RX_TIME_QUAL=0: Continue
receive if sync word has been found
• MCSM2.RX_TIME_QUAL=1: Continue
receive if sync word has been found or
preamble quality is above threshold
(PQT)
If the system can expect the transmission to
have started when enabling the receiver, the
MCSM2.RX_TIME_RSSI function can be used.
The radio controller will then terminate RX if
the first valid carrier sense sample indicates
no carrier (RSSI below threshold). See Section
13.10.4 on Page 195 for details on Carrier
Sense.
If RX terminates due to no carrier sense when
the MCSM2.RX_TIME_RSSI function is used,
or if no sync word was found when using the
MCSM2.RX_TIME timeout function, the chip
will always go back to IDLE.
13.13 Frequency Programming
The
frequency
programming
in
CC2510Fx/CC2511Fx is designed to minimize the
programming needed in a channel-oriented
system.
To set up a system with channel numbers, the
desired channel spacing is programmed with
the
MDMCFG0.CHANSPC_M
and
MDMCFG1.CHANSPC_E registers. The channel
spacing registers are mantissa and exponent
respectively.
( ) ∆f_CHANNEL =
f _ref
2¹⁸
⋅ 256 + CHANSPC _ M
⋅ 2^{CHANSPC _ E} ⋅ CHAN
22 _{fSymbol is the symbol rate for the data transmission (in this case 250 kBaud). Please see DN110 [11]}
for more details
23 _{This is the calibration time given that TEST0=0x0B and FSCAL3.CHP_CURR_CAL_EN=10 (max}
calibration time). Please see DN110 [11] for more details
SWRS055G
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