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IDT72V70800 Datasheet(PDF) 9 Page - Integrated Device Technology |
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IDT72V70800 Datasheet(HTML) 9 Page - Integrated Device Technology |
9 / 21 page 9 IDT72V70800 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 512 x 512 COMMERCIALTEMPERATURERANGE 0123 4 5 6 7 8 9 10 11 12 13 14 15 16 ST-BUS Frame Offset Value FE Input 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 GCI Frame CLK Offset Value FE Input (FD[10:0] = 06H) (FD11 = 0, sample at CLK LOW phase) (FD[10:0] = 09H) (FD11 = 1, sample at CLK HIGH phase) 5709 drw04 CLK TABLE 7 — FRAME ALIGNMENT REGISTER (FAR) BITS Figure 4. Example for Frame Alignment Measurement Bit Name Description 15-13 Unused Must be zero for normal operation. 12 CFE When CFE = 1, the frame evaluation is completed and bits FD10 to FD0 bits contains a valid frame alignment (Complete Frame Evaluation) offset. This bit is reset to zero, when SFE bit in the IMS register is changed from 1 to 0. 11 FD11 The falling edge of FE (or rising edge for GCI mode) is sampled during the CLK-high phase (FD11 = 1) (Frame Delay Bit 11) or during the CLK-low phase (FD11 = 0). This bit allows the measurement resolution to ½ CLK cycle. 10-0 FD10-0 The binary value expressed in these bits refers to the measured input offset value. These bits are rest to (Frame Delay Bits) zero when the SFE bit of the IMS register changes from 1 to 0. (FD10 – MSB, FD0 – LSB) Read/Write Address: 02H, Reset Value: 0000H. 15 14 13 12 11 10 9876543210 0 0 0 CFE FD11 FD10 FD9 FD8 FD7 FD6 FD5 FD4 FD3 FD2 FD1 FD0 |
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