ML7396AB datasheet(49/140 Pages) LAPIS

49 / 140 page

FEDL7396A/B/E-07

ML7396A/B/E

49/140

IDLE determination exclusion under strong signal input

If acquired ED value exceeds [CCA_IGNORE_LVL: B0 0x12] register, IDLE dertermination is not performed as lon as a

given ED value is included in the averaging target range. If average ED value including this strong ED value indicated in

[ED_RSLT: B0 0x16] register exceeds the CCA threshold value defined by [CCA_LEVEL: B0 0x13] register, it is

considered as ”BUSY”. And CCA_RSLT[1:0]([CCA_CTRL: B0 0x15(1-0)])=0b01 is set.

If average ED value is smaller than CCA threshold value, IDLE determination is not performed and CCA_RSLT[1:0]

indicates 0b11 ”CCA evaluation on-going (ED value excluding CCA judgement acquisition)”. CCA will continue until

“IDLE” or “BUSY” determination (in case of IDLE detection mode, “IDLE2 is determined. In case of continuous mode,

CCA_LOOP_STOP([CCA_CTRL: B0 0x15(6)]) is issued.)

[Note]

CCA completion interrupt (INT[08] group2) is generated only when “IDLE” or “BUSY” is determined. Therefore, if data

whose ED value exceeds IGNORE_LV[7:0] ([CCA_IGNORE_LEVEL:B0 0x12(7-0)]) are input intermittently, neither

“IDLE” or “BUSY” can be determined and CCA may continues.

[ED value acquisition under extrem strong signal]

ED value >CCA_IGNORE_LVL

(

D value

analog)

IGNORE_LV[7:0]

[CCA_IGNORE_LEVEL: B0 0x12]

ED value

Shift register

(ED value 8 times

average)

[Time 1]

[Time2]

[Time 3]

[Time 8]

[Time 9]

Averaging target includes ED

value exceeding

IGNORE_LV[7:0]. In this case,

“IDLE” is not determined.

However, if averaging value

exceeds CCA threshold, “BUSY”

is determined.

●

ED value, which includes IGNORE_LV[7:0], is

out of averaging target. In this case, “IDLE” can

be determined.

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