Texas Instruments CC2500 User Manual

CC2500
S
WRS040
C
Page
88
of
89
36
General Information
36.1
Document History
Revision
Date
Description/Changes
SWRS040C
SWRS040B
2008
-
05
-
04
2007
-
05
-
09
Updated package
and ordering
information
.
kbps replaced by kBaud throughout the document.
Some of the sections have
been re
-
written to be easier to read without having any new info added.
Absolute maximum supply voltage rating increased from 3.6 V
to 3.
9
V.
FSK changed to 2
-
FSK throughout the document.
Updates to the
Abbreviation table.
Updates to the Electrical Specifications section.
Added ACP, OBW and blocking performance.
Maximum output power changed from 0 dBm to +1 dBm.
Added information abou
t reduced link
performance at n/2
∙crystal frequency.
Added info about RX and TX latency
in serial mode
.
Changes to the maximum RC oscillator frequency accuracy after calibration.
Added info abou
t default values after reset versus
optimum register settings in the Confi
guration
Software section
.
Changes to the SPI Interface Timing Requirements. Info added about
t
sp,pd
The following figures have
been changed: Configuration Registers Write and Read Operations,
SRES
Command Strobe, and
Register Acc
ess Types.
In the Register Access section, the address range is changed.
Changes to
PATABLE Access section
.
In the Packet Format section, preamble pattern is changed to 10101010 and info about bug related
to turning off the transmitter in infinite packet l
ength mode is added.
Added info to the Frequency Offset Compensation section.
Added info
about the initial value of the PN9 sequence in the Data Whitening section.
Added info about TX FIFO unde
r
flow state i
n the Packet Handling in Transmit Mode section
.
Ad
ded section Packet Handling in Firmware.
In the PQT section a change is ma
de as to how much the counter d
ecreases.
The RSSI value is in dBm and not dB.
The whole CS Absolute Threshold section has been re
-
written and the equation calculating the
threshold h
as been removed.
Added info in the CCA section on what happens if the channel is not clear.
Added info
t
o the LQI section for better understanding.
Removed all references to the voltage regulator in relation with the CHP_RDYn signal, as this
signal is only
related to the crystal.
Removed references to the voltage regulator in the figures: Power
-
On Reset and Power
-
On Reset
with SRES.
Changes to the SI line in the
Power
-
On Reset with SRES
figure
.
Added info on the
three automatic calibration options.
A
dded in
fo about minimum sleep time and references to App. Note 047 together with info about
calibration of the RC oscillator.
The figure E
vent 0 and Event 1 Relationship is changed for better readability.
Info added to the
RC Oscillator and
Timing section related
to reduced calibration time.
The Output Power Programming section
has been changed. Only 1 PATABLE entry used for 2
-
FSK/GFSK/MSK and 2 PATABLE entries used for OOK.
Added info
about PATABLE when
entering SLEEP mode.
New PA_POWER and PATABLE figure.
Added
section
on PCB
Layout Recommendations.
In section General Purpose / Test Output Control Pins: Added info on GDO pins in SLEEP state.
Asynchronous transparent mode is called
asynchronous
serial mode
throughout
the document.
Removed comments about having to
use NRZ coding in
synchronous
serial mode.
Added
info that Man
chester encoding cannot be used in
a
synchronous
serial
mode.
Change
d
number of commands strobes from 14 to 13.
Added two new registers;
RCCTRL1_STATUS
and
RCCTRL0_STATUS
Changed field name and/or description of the following registers:
MCSM2, MCSM0, WORCTRL,
FSCAL3, FSCAL2, FSCAL1,
TEST2, TEST1
and
TEST0.
Added references.

Texas Instruments CC2500 Specifications

General

Brand	Texas Instruments
Model	CC2500
Category	Transceiver
Language	English