ML7344J datasheet(51/151 Pages) ETC2

51 / 151 page

FEDL7344C/E/J-04

ML7344C/E/J

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ii) Data input mode (from host)

Set TXDIO_CTRL[1:0] ([DIO_SET: B0 0x0C(5-4)]) =0b10.

After TX_ON, DCLK is output during data input period after SyncWord. TX data is input at falling edge of

DCLK through DIO input. Encoded TX data must be transferred from the host. Preamble and SyncWordis

generated automatically according to the registers setting.

NOTE:.

Preamble can be set by PB_PAT([DATA_SET1: B0 0x07(7)] and TXPR_LEN[15:0] ([TXPR_LEN_H/L:B0

0x42/43]).

SyncWord can be set by SYNCWORD_SEL([DATA_SET1: B0 0x08(4)), SYNCWORD_LEN[5:0]

([SYNC_WORD_ LEN: B1 0x25(5-0)]), SYNC_WORD_EN* ([SYNC_WORD_EN: B1 0x26(3-0)]),

SYNC_WORD1[31:0] ([SYNCWORD1_ SET3/2/1/0: B1 0x27/28/29/2A]) and SYNC_WORD2[31:0]

([SYNCWORD2_SET3/2/1/0: B1 0x2B/2C/2D/2E]).

[RX]

i) Continuous output mode (to host)

Set RXDIO_CTRL[1:0] ([DIO_SET: B0 0x0C(7-6)]) =0b01.

After RX_ON(SET_TRX[3:0] ([RF_STATUS: B0 0x0B(3-0)])=0x6), DCLK is output continuously. RX data

(demodulated data) is output from DIO pin at falling edge of DCLK. RX data is not stored into RX_FIRO.

NOTE: For details of timing, please refer to the “RX” in the “Timing Chart”.

DIO(GPIO0-3,EXT_CLK)

TX_ON

command

TX data

DCLK(GPIO0-3,EXT_CLK)

Preamble

SyncWord

Data-field

TRX_OFF

command

TX_ON

DIO(GPIO0-3,EXT_CLK)

RX_ON

command

RX data

DCLK(GPIO0-3,EXT_CLK)

Preamble

SyncWord

Data-field

TRX_OFF

command

RX_ON

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