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CC2500-RTR1 数据表(PDF) 72 Page - Texas Instruments |
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CC2500-RTR1 数据表(HTML) 72 Page - Texas Instruments |
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72 / 96 page  CC2500 SWRS040C Page 72 of 89 0x18: MCSM0 – Main Radio Control State Machine Configuration Bit Field Name Reset R/W Description 7:6 Reserved R0 5:4 FS_AUTOCAL[1:0] 0 (00) 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) When going from RX or TX back to IDLE automatically 3 (11) Every 4 th time when going from RX or TX to IDLE automatically In some automatic wake-on-radio (WOR) applications, using setting 3 (11) can significantly reduce current consumption. 3:2 PO_TIMEOUT 1 (01) R/W Programs the number of times the six-bit ripple counter must expire after XOSC has stabilized before CHP_RDYn goes low. If XOSC is on (stable) during power-down, PO_TIMEOUT should be set so that the regulated digital supply voltage has time to stabilize before CHP_RDYn goes low (PO_TIMEOUT=2 recommended). Typical start-up time for the voltage regulator is 50 us. If XOSC is off during power-down and the regulated digital supply voltage has sufficient time to stabilize while waiting for the crystal to be stable, PO_TIMEOUT can be set to 0. For robust operation it is recommended to use PO_TIMEOUT=2. Setting Expire count Timeout after XOSC start 0 (00) 1 Approx. 2.3 – 2.4 μs 1 (01) 16 Approx. 37 – 39 μs 2 (10) 64 Approx. 149 – 155 μs 3 (11) 256 Approx. 597 – 620 μs Exact timeout depends on crystal frequency. 1 PIN_CTRL_EN 0 R/W Enables the pin radio control option 0 XOSC_FORCE_ON 0 R/W Force the XOSC to stay on in the SLEEP state. |
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