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DS21FT40 Datasheet(PDF) 27 Page - Dallas Semiconductor |
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DS21FT40 Datasheet(HTML) 27 Page - Dallas Semiconductor |
27 / 87 page DS21FT40 27 of 87 SYMBOLS POSITION NAME AND DESCRIPTION RBCS RCR2.2 Receive Side Backplane Clock Select. 0 = if RSYSCLK is 1.544 MHz 1 = if RSYSCLK is 2.048 MHz RESE RCR2.1 Receive Side Elastic Store Enable. 0 = elastic store is bypassed 1 = elastic store is enabled – RCR2.0 Not Assigned. Should be set to zero when written. TCR1: TRANSMIT CONTROL REGISTER 1 (Address=12 Hex) (MSB) (LSB) ODF TFPT T16S TUA1 TSiS TSA1 TSM TSIO SYMBOLS POSITION NAME AND DESCRIPTION ODF TCR1.7 Output Data Format. 0 = bipolar data at TPOS and TNEG 1 = NRZ data at TPOS; TNEG=0 TFPT TCR1.6 Transmit Timeslot 0 Pass Through. 0 = FAS bits/Sa bits/Remote Alarm sourced internally from the TAF and TNAF registers 1 = FAS bits/Sa bits/Remote Alarm sourced from TSER T16S TCR1.5 Transmit Timeslot 16 Data Select. 0 = sample timeslot 16 at TSER pin 1 = source timeslot 16 from TS0 to TS15 registers TUA1 TCR1.4 Transmit Unframed All Ones. 0 = transmit data normally 1 = transmit an unframed all one’s code at TPOS and TNEG TSiS TCR1.3 Transmit International Bit Select. 0 = sample Si bits at TSER pin 1 = source Si bits from TAF and TNAF registers (in this mode, TCR1.6 must be set to 0) TSA1 TCR1.2 Transmit Signaling All Ones. 0 = normal operation 1 = force timeslot 16 in every frame to all ones TSM CR1.1 TSYNC Mode Select. 0 = frame mode (see the timing in Section 16) 1 = CAS and CRC4 multiframe mode (see the timing in Section 16) TSIO TCR1.0 TSYNC I/O Select. 0 = TSYNC is an input 1 = TSYNC is an output NOTE: See Figure 16–15 for more details about how the Transmit Control Registers affect the operation of the DS21FT40. |
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