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ML7344CE Datasheet(PDF) 103 Page - LAPIS Semiconductor Co., Ltd.

Part # ML7344CE
Description  Sub-GHz(160MHz to 510MHz) band short range wireless transceiver IC
PDF  154 Pages
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Manufacturer  LAPIS [LAPIS Semiconductor Co., Ltd.]
Direct Link  http://www.lapis-semi.com/
Logo LAPIS - LAPIS Semiconductor Co., Ltd.

ML7344CE Datasheet(HTML) 103 Page - LAPIS Semiconductor Co., Ltd.

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FEDL7344C/E/J-05
ML7344C/E/J
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■Resister setting
●Initialization table
ML7344 needs initilaization. For the value to each register, please refer to the “ML7344 Initilaization Table”
document.
●RX mode setting
ML7344 has two RX modes. One is “High sensitivity mode” that is tuned for minimum RX sensitivity. It
achieves -118dBm under condition of BER<0.1%, 4.8kbps and Fdev=3kHz. The other is “High linearity mode”
that improves linearity about 6dB, so characteristics of blocking and power detection rang are grown instead of
sensitivity degradation about 3dB. For swtiching RX mode, set the register [LNA_GAIN1:B2 0x28] as below.
RX mode
[LNA_GAIN1:B2 0x28]
High sensitivity mode
0xF7
High linearity mode
0x07
●BER measurement setting
The following registers setting are necessary for RX side when measuring BER.
[DIO_SET: B0 0x0C] = 0x40
[MON_CTRL: B0 0x4D] = 0x80
[GPIO0_CTRL: B0 0x4F] to [GPIO3_CTRL: B0 0x52] for setting DCLK/DIO output pins.
[GAIN_HTOM: B1 0x0E] = 0x1E
When termiate BER measurement and reurn from RX state, Force TRX_OFF should be issued by
SET_TRX[3:0] ([RF_STATUS:B0 0x0b(3-0]) =0b0011.
●Wireless M-bus setting
The following parameter tables are example for programing each Wireless M-Bus mode (N/F).
●Mode N
(Channel frequency: 169.4125MHz, Modulation: GFSK, Data Rate: 4800bps)
Register
Parameter
Name
Address
Setting
Value
TXFREQ_I
B1 0x1B
0x0D
TXFREQ_FH
B1 0x1C
0x00
TXFREQ_FM
B1 0x1D
0x81
TX frequency
TXFREQ_FL
B1 0x1E
0xF8
RXFREQ_I
B1 0x1F
0x0D
RXFREQ_FH
B1 0x20
0x00
RXFREQ_FM
B1 0x21
0x81
RX frequency
RXFREQ_FL
B1 0x22
0xF8
CH_SPACE_H
B1 0x23
0x07
Channel space
CH_SPACE_L
B1 0x24
0xE0
PLL frequency division
PLL_DIV_SET
B1 0x1A
0x10



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