ML7344CE datasheet(133/154 Pages) LAPIS

Part #	ML7344CE

Description	Sub-GHz(160MHz to 510MHz) band short range wireless transceiver IC

PDF	154 Pages

Scroll/Zoom	100%

Manufacturer	LAPIS [LAPIS Semiconductor Co., Ltd.]

Direct Link	http://www.lapis-semi.com/

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133 / 154 page

FEDL7344C/E/J-05

ML7344C/E/J

133/154

(4) PLL unlock detection

○TX

During TX, if PLL unlock is detected, PLL unlock interrupt (INT[2] group1) will be generated. When PLL

unlock interrupt occurs, Force_TRX_OFF is automaticcally issued and move to IDLE state. SET_TRX[3:0]

([RF_STATUS: B0 0x0B(3-0)]) will be written to 0b0011(Force_TRX_OFF). PLL unlock might be occurred

when VCO calibration value is not correct. Please confirm VCO calibration or perform VCOcalibration again.

After PLL unlock interrupt occurs, max. 147 μs is necessary to move to IDLE state. Please wait for at least

147μs before next TX, RX or VCO calibration is performed.

Next packet TX?

Yes

PLL unlock (INT[12])?

[INT_SOURCE_GRP1:B0 0x0D(2)]

Normal TX

(To TX flowchart)

Yes

END

INT[12] clear

[INT_SOURCE_GRP1:B0 0x0D(2)]

TX_ON issue

[RF_STATUS:B0 0x0B]

Wait TRX_OFF(IDLE)

(147μsec)

Write TX data

[WR_TX_FIFO:B0 0x7C]

* Force_TRX_OFF is issued

automatically

START

ML7344CE Datasheet(PDF) 133 Page - LAPIS Semiconductor Co., Ltd.