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| 型號(hào)： | PM5352-B1 |
| 英文描述： | Interface IC |
| 中文描述： | 接口IC |
| 文件頁數(shù)： | 26/77頁 |
| 文件大小： | 901K |
| 代理商： | PM5352-B1 |
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PM5352 S/UNI STAR
DATA SHEET
PMC-1990421
ISSUE 2
SATURN USER NETWORK INTERFACE 155 (STAR)
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
22
Pin Name
Type
Pin
No.
Function
DTCA
Output
(ATM)
K22
UTOPIA Direct Transmit Cell Available (DTCA).
These output signals provide direct status indication
of when a cell is available in the transmit FIFO for
the corresponding port. When high, DTCA indicates
that the corresponding transmit FIFO is not full and
a complete cell may be written. When DTCA goes
low, it can be configured to indicate either that the
corresponding transmit FIFO is near full or that the
corresponding transmit FIFO is full. DTCA will
transition low on the rising edge of TFCLK after the
Payload word 19 (TCALEVEL0=0) or 23
(TCALEVEL0=1) is sampled if the PHY being polled
is the same as the PHY in use. To reduce FIFO
latency, the FIFO depth at which DTCA indicates
"full" can be set to one, two, three or four cells.
Note that regardless of what fill level DTCA is set to
indicate "full" at, the transmit cell processor can
store 4 complete cells
DTCA are updated on the rising edge of TFCLK.
This Material Copyrighted by Its Respective Manufacturer
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