AN633
Rev. 0.7
77
Figure 58. General Usage of the Continuous Transmission
In order to calculate the minimum number of packets to be transmitted, it is necessary to know how the different
time periods, such as the “Transmit Time”, the “RX Time” and “Sleep Time” relate to one another in the worst case
scenario. If the
transmitter starts to transmit just after the receiver entered sleep mode, the transmitter needs to
transmit while the receiver is in sleep mode plus the receiver wakes up and still a packet needs to be transmitted.
10.16. Standard Packet Reception with Low Duty Cycle Capability
The purpose of the standard packet reception example code using the low duty cycle mode is to demonstrate how
the radio can receive packets in FIFO mode when the radio chip is continuously switching between the RX state
and the SLEEP state. The receiver periodically wakes itself up to work on RX state. If a valid preamble is not
detected or an entire packet is not received, the receiver returns to the Sleep state and remains in that mode until
the beginning of the next RX state. If a valid preamble or sync word is detected, the receiver receives the entire
packet. Wireless Development Suite makes it possible to configure the length of the “RX time” and the “SLEEP
time”. In order to calculate the minimum length of the “RX time”, it is necessary to know how the different time
periods, such as the “Transmit Time”, the “RX Time” and “Sleep Time”, relate to one another in the worst case
scenario. If the receiver just settled right after the preamble is transmitted by the transmitter, the receiver couldn’t
get this packet. Consequently, the receiver has to stay awake as long as this packet is transmitted, wait for the
delay between the transmitted packets plus for the preamble is transmitted from the next packet to trigger the
preamble detection circuit.
min Transmit Time
T SLEEP Time
T XTal on
PLL settle
+
T one packet
+
+
=
min RX Time
T packet w/o preamble
T packet delay
T preamble threshold
+
+
=
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...