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MT9072AB Datasheet(PDF) 56 Page - Zarlink Semiconductor Inc |
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MT9072AB Datasheet(HTML) 56 Page - Zarlink Semiconductor Inc |
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56 / 275 page  MT9072 Data Sheet 56 Zarlink Semiconductor Inc. In T1 mode, the transmit and receive elastic buffers also serve the purpose of rate conversion between the 1.544 Mbit/s line rate and the 2.048 Mbit/s backplane rate. Consequently, in T1 mode the elastic buffers cannot be bypassed, except for the special case of T1 IMA mode. Register Address Register Description Y00 Framing Mode Select If IMA mode is selected the transmit and receive elastic buffers are bypassed. Y13 Receive Slip Buffer Status Word This register provides status bits for receive slip and its direction word that indicates the phase difference between the ST-BUS and the PCM24 Y14 Transmit Slip Buffer Status Word This register provides status bit for transmit slip and its direction word that indicates the phase difference between the ST-BUS and the PCM24. Y26 Elastic Store and Excessive Zero Status Latch This register indicates the latched version of the slip indicator bits from registers Y13 and Y14. Y36 Elastic Store and Excessive Zero Interrupt Status Interrupt status word for the slip indicators. Y46 Elastic Store and Excessive Zero Interrupt Mask Interrupt mask bits for the slip indicators. YF7 Transmit Set Delay Bits This register sets a one time delay through the transmit slip buffer. Table 14 - Registers Related to the Elastic Buffer (T1) Register Address Register Description Y00 Framing Mode Select If IMA mode is selected the receive elastic buffers are bypassed. Y03 DL,CCS,CAS and Other Control Register ELAS bit is used to bypass the elastic store, that data at DSTo is the received. PCM30 data after the HDB3 coding. Y10 Sync and CRC-4 Remote status RSLP and RSLPD show the slip and the direction of the slip. Y14 Phase Status Indicator This word reflects the delay through the receive elastic store from the line to the ST-BUS side. Y34 Sync,CRC-4 Remote, Alarm, MAS and Phase Status Word RSLIPI in this register reflects the interrupt due to a slip. Y44 Sync,CRC-4 Remote, Alarm, MAS and Phase Status Word Interrupt Mask Interrupt mask bits for the slip indicator. Table 15 - Registers Related to Elastic Store (E1) |
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