CC2500 Datasheet, PDF (64/76 Pages) Texas Instruments – Single Chip Low Cost Low Power RF Transceiver

CC2500
0x18: MCSM0 – Main Radio Control State Machine configuration
Bit Field Name
Reset
R/W Description
7:6 Reserved
5:4 FS_AUTOCAL[1:0]
3:2 PO_TIMEOUT
1 PIN_CTRL_EN
0 XOSC_FORCE_ON
0 (00)
1 (01)
0
0
R0
R/W Automatically calibrate when going to RX or TX, or back to IDLE
Setting When to perform automatic calibration
0 (00) Never (manually calibrate using SCAL strobe)
1 (01) When going from IDLE to RX or TX (or FSTXON)
2 (10)
3 (11)
When going from RX or TX back to IDLE
Every 4^th time when going from RX or TX to IDLE
In some automatic wake-on-radio (WOR) applications, using
setting 3 (11) can significantly reduce current consumption.
R/W Programs the number of times the six-bit ripple counter must
expire before CHP_RDY_N goes low. Values other than 0 (00)
are most useful when the XOSC is left on during power-down.
Setting Expire count Timeout after XOSC start
0 (00) 1
Approx. 2.3 – 2.7 µs
1 (01) 16
Approx. 37 – 43 µs
2 (10) 64
Approx. 146 – 171 µs
3 (11) 256
Approx. 585 – 683 µs
Exact timeout depends on crystal frequency.
R/W Enables the pin radio control option
R/W Force the XOSC to stay on in the SLEEP state.
0x19: FOCCFG – Frequency Offset Compensation configuration
Bit Field Name
Reset R/W Description
7:6 Reserved
5:0 FOCCFG[5:0]
R0
54
R/W Frequency offset compensation configuration. The value to use
(0x36)
in this register is given by the SmartRF^® Studio software.
Bit Field Name
7:0 BSCFG[7:0]
0x1A: BSCFG – Bit Synchronization configuration
Reset R/W Description
108
R/W Bit Synchronization configuration. The value to use in this register is
(0x6C)
given by the SmartRF^® Studio software.
Preliminary Data Sheet (rev.1.1.) SWRS040
Page 64 of 77