IBM3009K2672
IBM SONET/SDH Framer
PHY Layer Interface Pin Descriptions (Sheet 4 of 4)
Pin Name
Pin No.
I/O
Type
Pin Description
Receive Payload Available Indicator Output: Tri-stateable output signal
which indicates that a complete chunk or cell is available for transfer.
RXCLAV is asserted high to indicate that it has a complete cell or chunk to
transfer, otherwise RXCLAV is asserted low.
UTOPIA Level 1: RXCLAV(0) is the cell available indication for
receive UTOPIA Level 1 interface 1. RXCLAV(1)-RXCLAV(3) are the
receive CLAV, Start of Cell, and Parity outputs for receive UTOPIA
Level 1 interface 2.
UTOPIA Level 2: RXCLAV(3:0) are the cell available indications for
the receive UTOPIA Level 2 interface. RXCLAV(3:0) can be config-
ured for direct status (RXCLAV(0) only or RXCLAV(3:0)) or multi-
plexed status (RXCLAV(0) only or RXCLAV(3:0)) via the SIndR1(1:0)
bits.
RXCLAV(0)
RXCLAV(1)
RXCLAV(2)
RXCLAV(3)
AB12
Y11
W11
O (T)
LVTTL-5fd
V11
UTOPIA Level 2+: RXCLAV(3:0) are the chunk available indications
for the receive UTOPIA Level 2+ interface. RXCLAV(3:0) can be con-
figured for direct status (RXCLAV(0) only or RXCLAV(3:0)) or multi-
plexed status (RXCLAV(0) only or RXCLAV(3:0)) via the SIndR1(1:0)
bits. Chunks are analogous to cells. RXCLAV functions exactly the
same way as in ATM mode, expect that RXCLAV indicates that the
SONET/SDH framer has at least one chunk to transfer (as opposed to
having cells to transfer).
Receive End-of-Frame Output: (Active high)
RXEOFO
RXMSO
T09
T10
O (T)
O (T)
LVTTL-5fd
LVTTL-5fd
Used only during UTOPIA Level 2+ operation, this pin indicates the end of
a block of frame data.
Receive Most Significant Byte Output: (Active high)
Used only during UTOPIA Level 2+ operation, this pin indicates the frame
data ends on the MSB of the current word transfer.
Receive Frame FCS Error Output: (Active high)
Used only during UTOPIA Level 2+ operation, this pin indicates that an
FCS error is detected on the current frame. When FCSABT control bit is
set to a ‘1’, this pin will also indicate when an ABORT sequence (i.e., an
illegal sequence of 7D7E H) is received on the current frame.
RXFCSEO
RXABTO
U11
T11
O (T)
LVTTL-5fd
LVTTL-5fd
Receive Abort Output:
This pin is used only during UTOPIA Level 2+ operation. When FCSABT is
set to ’0’, this pin is an active high output signal that indicates that an
ABORT condition (i.e., illegal sequence of 7D7E H detected or a receive
ACB FIFO overflow) has been detected on the current frame. When FCS-
ABT is set to ‘1’, this pin is forced low. In MPHY mode, if a receive abort
condition occurs in a macro, say macro n, while macro m is being
accessed, the RXABTO indication for macro n will not be output until
macro n is selected.
O (T)
ssframer.01
8/27/99
Pin Information
Page 35 of 279
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