ML7396AB datasheet(45/140 Pages) LAPIS

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FEDL7396A/B/E-07

ML7396A/B/E

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Continuous mode

Continuous mode continues CCA operation until terminated by the host MCU. CCA continuous mode will be executed

when RX_ON is issued while CCA_EN ([CCA_CNTRL:B0 0x15(4)])=0b1, CCA_IDLE_EN ([CCA_CNTRL:B0

0x15(3)])=0b0 and CCA_LOOP_START ([CCA_CNTRL:B0 0x15(5)])=0b1 are set.

Like normal mode, CCA is determined by average ED value in [ED_RSLT:B0 0x16] register and threshold value defined

by [CCA_LEVEL:B0 0x13] register. If average ED value exceeds CCA threshold, it is determined as “BUSY”, set

CCA_RSLT[1:0] ([CCA_CNTRL:B0 0x15(1-0)]) =0b01. If ED value is smaller than CCA threshold, and maintains IDLE

detection period which is defined by IDLE_WAIT[9:0] of the [IDLE_WAIT_L:B0 0x17], [IDLE_WAIT_H:B0 0x18]

resisters, it is determined as “IDLE”. And CCA_RSLT[1:0] = 0b00 is set. For details operation of IDLE_WAIT[9:0], please

refer to “IDLE detection for long period”.

If an ED value exceeds the value defined by [CCA_IGNORE_LEVEL:B0 0x12] register, and as long as a given ED value is

included in the averaging target of ED value calculation, IDLE judgment is not performed. In this case, if average ED value

exceeds CCA threshold value, it is determined as “BUSY” and CCA operation is terminated. However, if average ED value is

smaller than CCA threshold value, IDLE judgment is not determined. And CCA_RSLT[1:0] indicates 0b11. For detail

operation of ED value exceeding [CCA_IGNORE_LEVEL:B0 0x12] register, please refer to "IDLE determination exclusion

under strong signal input".

Continuous mode does not stop when “BUSY” or “IDLE” is determined. CCA operation continues until 0b1 is set to

CCA_LOOP_STOP ([CCA_CNTRL:B0 0x15(6)]). Result is updated every time ED value is acquired. CCA_DONE

([CCA_CNTRL:B0 0x15(2)]) will not be 0b1, and CCA completion interrupt (INT[08] group2) will not be generated.

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