ML7406 datasheet(44/104 Pages) ETC2

44 / 104 page

FEDL7406-02

ML7406

44/104

If DIO_START is issued before SyncWord detection, data is not buffered in RX_FIFO and RX data after SyncWord

detection will be output at falling edge of DCLK . In order to complete RX before SYNC becomes ”L”, DIO RX completion

setting (DIO_RX_COMPLETE([DIO_SET: B0 0x0C(2)]=0b1) is necessary. After DIO_RX_COMPLETE setting, ready to

receive the next packet.

iii) Data output mode 2 (to host)

Set RXDIO_CTRL[1:0] ([DIO_SET: B0 0x0C(7-6)])=0b11.

Only Data-field of RX data is buffered in RX_FIFO. RX data indicated by L-field is stored in RX_FIFO. By

DIO_START([DIO_SET: B0 0x0C(0)])=0b1, top data of buffered data will be output through DIO interface

(DIO/DCLK). (RX data is output at falling edge of DCLK).

However, if DIO_START setting is done after 64 byte timing, the top byte will be overwritten. If all data indicated by

L-field is output, RX completion interrupt (INT[8] group2) will be generated. After RX completion, ready to receive next

packet. Length information is stored in [RX_PKT_LEN_H/L: B0 0x7D/7E] registers. This mode support fileld check

function.

(Note)

RX data buffering in RX_FIFO is byte by byte access. DIO_START should be issued after elapsed time from SyncWord

detection to L-field length + over 1byte access time.

DIO(GPIO0-3,EXT_CLK)

RXON

RX_ON

Command

RX data

DCLK(GPIO0-3,EXT_CLK)

Preamble

SyncWord

Data-field

TRX_OFF

command

DIO_START

issue

DIO(GPIO0-3,EXT_CLK)

RXON

RX_ON

Command

RX data

DCLK(GPIO0-3,EXT_CLK)

Preamble

SyncWord

Data-field

TRXOFF

command

Buffering to RX_FIFO

RX sync signal

DIO_START=0b1

L-field

DIO_RX_COMPLETE

=0b1

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