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ML7344CE датащи(PDF) 38 Page - LAPIS Semiconductor Co., Ltd. |
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ML7344CE датащи(HTML) 38 Page - LAPIS Semiconductor Co., Ltd. |
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38 / 154 page ![]() FEDL7344C/E/J-05 ML7344C/E/J 38/154 (3) Format C (non Wireless M-BUS, general purpose format) By setting PKT_FORMAT([PKT_CTRL1: B0 0x04(1-0)])=0b10, Format C, which is non Wireless M-BUS format, is selected. Format C consists of 1st Block only, which has 2 bytes of CRC. “L-field” indicates packet length, which includes subsequent user data bytes, including CRC bytes. The length of “L-field” is defined by LENGTH_MODE ([PKT_CTRL2:B0 0x5(0]). Data Whitening function is supported. The following [] indicates register address [bank #, address]. *1: Preamble length (n) is programable by [TXPR_LEN_H/L: B0 0x42/43] registers. *2: Indicates TX FIFO data storage area size. *3: Indicates RX FIFO data storage area size. *4: When RXDIO_CTRL[1:0] ([DIO_SET: B0 0x0C(7-6)])=0b10, indicates DCLK/DIO output area. Length MSB LSB Preamble Sync Word TX: automatic insertion RX: automatic detection, deletion Manchester/3-out-of-6 applicable [B0 0x07(3-2,1-0)] 1st Block Postamble L field 1/2 byte CRC field 0/1/2/4 bytes Data field Max.2047 bytes 0/2-8 bits Max. 32bits > n*2(*1) bits CRC applicable (*2) (*3) (*4) [B0 0x07] [B0 0x42] [B0 0x43] [B0 0x08] [B1 0x25-2E] [B0 0x05] [B0 0x7A/7B] [B0 0x7D/7E] [B0 0x44] Whitening applicable [B0 0x08(0)] [B0 0x05] |
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