ML7344J datasheet(53/151 Pages) ETC2

53 / 151 page

FEDL7344C/E/J-04

ML7344C/E/J

53/151

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_START=0b1

DIO(GPIO0-3,EXT_CLK)

RX_ON

command

RX data

DCLK(GPIO0-3,EXT_CLK)

TRX_OFF

command

Buffering to RX_FIFO

RX sync signal

Preamble

SyncWord

Data-field

DIO_RX_COMPLETE

=0b1

DIO(GPIO0-3,EXT_CLK)

RXON

RX data

DCLK(GPIO0-3,EXT_CLK)

Preamble

SyncWord

Data-field

L-field

DIO_START=0b1

RX_ON

command

TRX_OFF

command

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