ML7396AB datasheet(32/140 Pages) LAPIS

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FEDL7396A/B/E-07

ML7396A/B/E

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(2) RX (FIFO access size is 128 bytes)

Set FIFO_ADR_EN ([PACKET_MODE_SET:B0 0x45(7)]) =0b1, and issuing RX_ON by [RF_STATUS:B0 0x6C]

Read [RD_FIFO_LAST:B0 0x7C] register. When FIFO address indication (hereafter, Write pointer) is 5 or more, read 5

bytes from FIFO ([RD_RX_FIFO:B0 0x7F] register). At this time, if the Length field is less than 5, this paclet does not

meet IEEE802.15.4 requirement of the minimum packet length, the the packet might be discarded. (* It is not applied when

using an original packet format other than IEEE802.15.4.) When it is equal to or more than 5 and less than 128, wait RX

completion interrupt (INT[18]/[19] group3) and then read out the remaining data from FIFO.

, if the Length field is 128 or more, after Write pointer is 128 or more, read 123 bytes from FIFO. After that, if the

remaining RX data size is less than 128, go to

, if the remaining RX data size is 128 or more, after Write pointer is 0 to 127, read 128 bytes from FIFO. After that, if

the remaining RX data size is less than 128, go to

, if the remaining RX data size is 128 or more, after Write pointer is 128 to 255, read 128 bytes from FIFO. After that,

if the remaining RX data size is less than 128, go to

Repeat

and

until for the necessary amount of Rx data.

After RX completion interrupt (INT[18]/INT[19], group3) notification, read out the remaining RX data from FIFO.

RX_ON issue

[RF_STATUS:B0 0x6C]

Yes

Write pointer

≥5?

[RD_FIFO_LAST:B0 0x7C]

Yes

Read 5 bytes from FIFO

and Length

≥5?

Discard packet

Clear FIFO

[RST_SET:B0 0x01]

Read remaining data

[RD_RX_FIFO:B0 0x7F]

Yes

RX completion?

(INT[18]/[19])

[INT_SOURCE_GRP3:B0 0x26]

Write pointer

≥128?

[RD_FIFO_LAST:B0 0x7C]

0≤Write pointer≤127?

[RD_FIFO_LAST:B0 0x7C]

Read 128 bytes

[RD_RX_FIFO:B0 0x7F]

Read 128 bytes

[RD RX FIFO:B0 0x7F]

Read 128 bytes

[RD_RX_FIFO:B0 0x7F]

Remaining amount

≥128?

Remaining amount

≥128?

Remaining amount

≥128?

128≤Write pointer≤255?

[RD_FIFO_LAST:B0 0x7C]

Yes

Length

≥128?

Time

Total Rx data

[Receive]

RX FIFO address indication (read pointer)

increments after Rx start.

After receiving 256

th byte data, the address

indication is turned to 0 and increments

again.

Start receiving

RX FIFO address indication

255

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