ML7396AB datasheet(35/140 Pages) LAPIS

35 / 140 page

FEDL7396A/B/E-07

ML7396A/B/E

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●Data whitening function

ML7396 family supports data whitening function specified in IEEE 802.15.4g standard. The following figure shows the PN9

pattern generator. The generated pattern will be “XOR” with data located in PSDU area.

Initialization value can be configured by [PN9_SET_L:B0 0x7A] and [PN9_SET_H:B0 0x7B] registers.

When setting PN9_EN ([PN9_SET_H:B0 0x7B(7)]) =0b1, this generator can be used as random number generator.

When WHITENING ([PACKET_MODE_SET:B0 0x45(4)]) =0b1, whitening condition is set by IEEE_MODE

([PACKET_MODE_SET:B0 0x45(1)] setting. Please refer to the "Packet format".

• In IEEE802.15.4d mode (IEEE_MODE=0b0), data whitening applied to every TX or RX packet

• In IEEE802.15.4g mode (IEEE_MODE=0b1), data whitening will be applied to the packet which whitening bit in PHR

fieled is set to 0b1

[Note]

The PN9 pattern generator shares setting with the Whitening function. While the Whitening function is running, PN9_EN

should be set to 0b0.

TX: En = Rn

PN9n

RX: Rn = REn

PN9n

En:

Whitening bits as TX data

Rn:

data bits

REn:

Whitening bits as RX data

PN9n:

PN9 pattern (Initialization value 0b111111111)

Fig. PN9 pattern generator

●FEC function

ML7396 family supports FEC function. FEC function will be applied to PHR and PSDU field as shown in below.

[Note]

Length in PHR fieled should be set the length before FEC encoding.

When using whitening function at same time, whitening will apply to the FEC encoded data. For more details of

whitening field, please refer to the “Packet format”.

Inrerleaving mode is not compliant to IEEE802.15.4g.

PN9

PHR

MSB

LSB

PSDU

(CRC)

Preamble

SFD

(User data)

FEC field

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