IBM3009K2672
IBM SONET/SDH Framer
PHY Layer Interface Pin Descriptions (Sheet 2 of 4)
Pin Name
Pin No.
I/O
Type
Pin Description
Transmit Payload Available Indicator: TXCLAV/PAVO indicates that the
SONET/SDH framer can accept a complete cell or chunk.
UTOPIA Level 1: TXCLAV(0) is the cell available indication for trans-
mit UTOPIA Level 1 interface 1. TXCLAV(1) is the cell available indi-
cation for transmit UTOPIA Level 1 interface 2.
UTOPIA Level 2: TXCLAV(3:0) are the cell available indications for
the transmit UTOPIA Level 2 interface. TXCLAV(3:0) can be config-
ured for direct status (TXCLAV(0) only or TXCLAV(3:0)) or multi-
plexed status (TXCLAV(0) only or TXCLAV(3:0)) via the SIndT1(1:0)
bits.
TXCLAV(0)/PAVO
TXCLAV(1)
A06
D07
F07
G07
O (T)
LVTTL-5fd
TXCLAV(2)
TXCLAV(3)
UTOPIA Level 2+: TXCLAV(3:0) are the chunk available indications
for the transmit UTOPIA Level 2+ interface. TXCLAV(3:0) can be con-
figured for direct status (TXCLAV(0) only or TXCLAV(3:0)) or multi-
plexed status (TXCLAV(0) only or TXCLAV(3:0)) via the SIndT1(1:0)
bits. Chunks are analogous to cells. TXCLAV functions exactly the
same way as in ATM mode, expect that TXCLAV indicates the
SONET/SDH framer’s ability to accept chunks instead of cells.
Transmit End-of-Frame Input: Used only during UTOPIA Level 2+ opera-
tion, this pin indicates the end-of- frame data input.
TXEOFI
TXMSI
H11
K10
I
I
LVTTL-5sd
Transmit Most Significant Byte Input: Used only during UTOPIA Level
LVTTL-5sd 2+ operation, this pin indicates the frame data ends on the MS byte of the
current word transfer.
Transmit Frame Abort Output: Used only during UTOPIA Level 2+ oper-
ation, this pin indicates when a transmit FIFO has underflowed during the
middle of the transfer of the “HDLC-like” frame. In MPHY mode, if a trans-
mit ACB FIFO underflow occurs in a macro, say macro n, while macro m is
being accessed, the TXABTO indication for macro n will not be output until
macro n is selected.
TXABTO
F12
O (T)
LVTTL-VD
An external 1-3 kΩ pull-down resistor is required for this pin to ensure that
the TXABTO pin is pulled to its inactive state in a timely manner in order to
avoid functional problems.
Receive UTOPIA Clock 1: The data and control signals are transferred on
the rising edge of this clock.
UTOPIA Level 1: This clock is used for receive UTOPIA Level 1 inter-
face 1. Maximum clock frequency is 25 MHz.
UTOPIA Level 2: This clock is used for the receive UTOPIA Level 2
interface. Maximum clock frequency is 50 MHz.
UTOPIA Level 2+: This clock is used for the receive UTOPIA Level
2+ interface. Maximum clock frequency is 50 MHz.
RXUCLK1
RXUCLK2
AE05
AD05
I
I
LVTTL-5sp
LVTTL-5sp
Receive UTOPIA Clock 2: The data and control signals are transferred on
the rising edge of this clock.
UTOPIA Level 1: This clock is used for receive UTOPIA Level 1 inter-
face 2. Maximum clock frequency is 25 MHz.
UTOPIA Level 2: This clock is not used.
UTOPIA Level 2+: This clock is not used.
ssframer.01
8/27/99
Pin Information
Page 33 of 279
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