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GS1575ACNE3 bảng dữ liệu(PDF) 7 Page - Gennum Corporation |
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GS1575ACNE3 bảng dữ liệu(HTML) 7 Page - Gennum Corporation |
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7 / 29 page  GS1575A / GS9075A Data Sheet 34716 - 0 December 2005 7 of 29 24, 25, 26 SS[2:0] Bi-directional When AUTO/MAN is HIGH, SS[0:2] are outputs, displaying the data rate to which the PLL has locked. When AUTO/MAN is LOW, SS[0:2] are inputs, forcing the PLL to lock only to a selected data rate . 27 ASI/177 Logic Input When set HIGH, the device disables the 177Mb/s data rate in the data rate detection circuit. This prevents a false lock to 177Mb/s when using DVB-ASI. When set LOW, 177Mb/s lock is possible, however, if a 270Mb/s ASI signal is applied, the device could false lock to the 177MHz signal. 28 LOCKED Output Lock Detect. This pin is set HIGH by the device when the PLL is locked. 29 LOS Output Loss of Signal. Set HIGH when there are no transitions on the active DDI[3:0] input. See Lock and LOS on page 22. 30 VCC_DIG Power Most positive power supply connection for the internal glue logic. Connect to 3.3V. 31 VEE_DIG Power Most negative power supply connection for the internal glue logic. Connect to GND. 33 SD/HD (GS1575A only) Output This signal will be set LOW by the device when the reclocker has locked to 1.485Gbps or 1.485/1.001Gbps, or when a non-SMPTE standard is applied (i.e. the device is not locked). It will be set HIGH when the reclocker has locked to 143Mbps, 177Mbps, 270Mbps, 360Mbps, or 540Mbps. 33 SD (GS9075A only) Output This signal will go HIGH when the reclocker has locked to the input SD signal. It will be LOW otherwise. 34 KBB Analog Input Controls the loop bandwidth of the PLL. Leave this pin floating for serial reclocking applications. 35 SCO_ENABLE Power Serial clock output enable. Connect to VCC to enable the serial clock output. Connect to GND to disable the serial clock output. NOTE: This is not a TTL signal input. Table 1-1: Pin Descriptions (Continued) Pin Number Name Type Description SS2 SS1 SS0 DATA RATE SELECTED/FORCED (Mb/s) 0 0 0 143 0 0 1 177 0 1 0 270 0 1 1 360 1 0 0 540 1 0 1 1483.5/1485 |
Số phần tương tự - GS1575ACNE3 |
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Mô tả tương tự - GS1575ACNE3 |
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