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參數(shù)資料
| 型號： | IDT77V1254L25L25PGI |
| 廠商： | Integrated Device Technology, Inc. |
| 英文描述： | Quad Port PHY (Physical Layer) for 25.6 and 51.2 ATM Networks |
| 中文描述： | 四端口PHY（實(shí)體層）為25.6和51.2 ATM網(wǎng)絡(luò) |
| 文件頁數(shù)： | 31/47頁 |
| 文件大?。?/td> | 840K |
| 代理商： | IDT77V1254L25L25PGI |
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September 21, 2001
IDT77V1254L25
From the above measurements taken, the amount of jitter being added at each TX point is not significant. These tests were also run for extended
periods of time (64 hours) and no bit errors were seen.
VPI/VCI Swapping
For compatibility with IDT's SwitchStar products (77V400 and 77V500), the 77V1254L25 has the ability to swap parts of the VPI/VCI address
space in the header of receive cells. This function is controlled by the VPI/VCI Swap bits, which are bit 5 of the Enhanced Control Registers (0x08,
0x18, 0x28 and 0x38). The portions of the VPI/VCI that are swapped are shown below. Bits X(7:0) are swapped with Y(7:0) when the VPI/VCI Swap
bit is set and the chip is in DPI mode.
Jitter at 25.6Mbps at point 4 with respect to point 1
Jitter at 25.6Mbps at point 5 with respect to point 1
Jitter at 51.2Mbps at point 4 with respect to point 1
Jitter at 51.2Mbps at point 5 with respect to point 1
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