ML7344J datasheet(98/151 Pages) ETC2

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FEDL7344C/E/J-04

ML7344C/E/J

98/151

●Energy detection value (ED value) adjustment

ED value is calculated by RSSI signal (analog signal) from RF part, By performing the following adjustment, it

is possible to correct the variation in LSIs.

[ED value]

ED value is calculated as following formula,

RSSI value = 1.35 * (input level[dBm] – variations[dBm] – other losses[dBm]) + offset

ED value (CCA threshold) = (RSSI value + RSSI_ADJ) * RSSI_MAG_ADJ

Value

Item

High Sensitivity Mode

High Linearity Mode

offset

164.5

156

Variation (individual, temp.)[dBm]

Other loss[dBm]

Antenna, matching circuits loss

RSSI_ADJ

The setting of [RSSI_VAL:B1 0x14]

RSSI_MAG_ADJ

The setting of [RSSI_ADJ: B0 0x66]

[ED value asjustment]

At first, inputting the low-level signal to ANT terminal. Adjusting the RSSI_ADJ value so that ED_VALUE

[ED_RSLT:B0 0x3A(7-0)] indicates the target value of the low-level signal.. Next inputting the high-level signal

and adjusting the RSSI_MAG_ADJ value so that ED_VALUE indicates the target value of the high-level signal.

Repeat several times in accordance with the required accuracy.

RSSI_ADJ

(B0 0x66)

RSSI_MAG_ADJ

(B1 0x13)

RF input level

high

low-

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