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| 型號： | PM5352-B1 |
| 英文描述： | Interface IC |
| 中文描述： | 接口IC |
| 文件頁數(shù)： | 36/77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
32
Pin Name
Type
Pin
No.
Function
DRCA
Output
(ATM)
M21
UTOPIA Direct Receive Cell Available (DRCA).
These output signals provides direct status
indication of when a cell is available in the receive
FIFO for the corresponding port. DRCA can be
configured to be de-asserted when either zero or
four bytes remain in the selected/addressed FIFO.
DRCA will thus transition low on the rising edge of
RFCLK after Payload word 24 (RCALEVEL0=1) or
19 (RCALEVEL0=0) is output if the PHY being
polled is the same as the PHY in use.
DRCA[x] is updated on the rising edge of RFCLK.
POS-PHY Direct Receive Packet Available
DRPA provides a direct status indication. DRPA
indicates when data is available in the receive
FIFO. When DRPA is high, the receive FIFO has at
least one end of packet or a programmable
minimum number of bytes to be read. DRPA is
otherwise low. The polarity of DRPA can be inverted
with the RPAINV register bit.
DRPA is updated on the rising edge of RFCLK.
POS-PHY Receive Modulo (RMOD).
The RMOD signal indicates the number of bytes
carried by the RDAT[15:0] bus during the last word
of a packet transfer. During a packet transfer every
word must be complete except the last word which
can be composed of 1 or 2 bytes. RMOD set high
indicate a single byte word (present on MSB’s,
LSB’s are discarded) while RMOD set low indicates
a two byte word. RMOD is only used in POS mode.
RMOD is tristated when RENB is deasserted.
RMOD is also tristated when either the null-PHY
address (0x7H) or an address not matching the
address space set by PHY_ADR[2:0] is latched
from the RADR[2:0] inputs when RENB is high.
RMOD is updated on the rising edge of RFCLK.
DRPA
Output
(POS)
M21
RMOD
Output
(POS)
Y19
This Material Copyrighted by Its Respective Manufacturer
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