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DS3172 Scheda tecnica(PDF) 18 Page - Dallas Semiconductor |
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DS3172 Scheda tecnica(HTML) 18 Page - Dallas Semiconductor |
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18 / 232 page ![]() DS3171/DS3172/DS3173/DS3174 18 of 230 6 MAJOR OPERATIONAL MODES The major operational modes are determined by the FM[2:0] framer mode bits and a few other control bits. Unused features are powered down and the data paths are held in reset. The configuration registers of the unused features can be written to and read from. The function of some IO pins change in different operational modes. The line interface operational mode is determined by the LM[2:0] bits. 6.1 DS3/E3 SCT Mode This mode is for standard operation that uses the device in the single chip transceiver mode. It utilizes the framer/formatter as well as the transmit/receive LIU. FRAME MODE FM[2:0] DS3 C-bit Framed 000 DS3 M23 Framed 001 E3 G.751 Framed 010 E3 G.832 Framed 011 LIU MODE LM[2:0] TZSD & RZSD TLEN PORT.CR2 JA Off, B3ZS or HDB3 001 0 0 JA RX, B3ZS or HDB3 010 0 0 JA TX, B3ZS or HDB3 011 0 0 JA Off, AMI 001 1 0 JA RX, AMI 010 1 0 JA TX, AMI 011 1 0 |
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