AN633
Rev. 0.7
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to send (CTS) signal shows the actual status of the command buffer of the radio. It can be monitored over the SPI
or on GPIOs, or the chip can generate an interrupt if it is ready to receive the next command. These three options
are detailed below.
7.2. Checking the Radio is Ready to Receive Command
7.2.1. Software Polling Method
To ensure the radio is ready to receive the next command, the host MCU has to pull down the NSEL pin to monitor
the status of CTS over the SPI port. The 0x44 command ID has to be sent and eight clock pulses have to be
generated on the SCLK pin. During the additional eight clock cycles, the radio clocks out the CTS as a byte on the
SDO pin. When completed, the NSEL should be pulled back to high. If the CTS byte is 0xFF, it means that the radio
processed the last command successfully and is ready to receive the next command; in any other case, the CTS
read procedure has to be repeated from the beginning as long as the CTS byte is not 0xFF.
Figure 6. Polling the Radio Availability
0x44
NSEL
SDO
SDI
SCK
CTS
Содержание EZRADIOPRO Si4060
Страница 24: ...AN633 24 Rev 0 7 Figure 20 Supply Current versus Time Diagram from Shutdown to RX State...
Страница 67: ...AN633 Rev 0 7 67 Figure 48 Variable Length Packet Reception Flowchart...
Страница 69: ...AN633 Rev 0 7 69 Figure 50 Packet Matching Reception Flowchart...
Страница 73: ...AN633 Rev 0 7 73 Figure 54 Packet Reception with Automatic RX Hopping Flowchart...
Страница 75: ...AN633 Rev 0 7 75 Figure 56 Packet Reception with Manual Rx Hopping...
Страница 80: ...AN633 80 Rev 0 7 Figure 62 Long Packet Transmission Workflow...
Страница 81: ...AN633 Rev 0 7 81 Figure 63 Long Packet RX Flowchart...