RELEASED
PM7351 S/UNI-VORTEX
DATA SHEET
PMC-1980582
ISSUE 5
OCTAL SERIAL LINK MULTIPLEXER
Ball
Ball
Type No. Function
Name
TENB
Input U22 The active low write enable (TENB) signal is used to
indicate cell transfers to the internal cell buffers. The
segment of the buffer associated with a particular
logical channel is determined by the inband address in
the prepended cell bytes.
TENB is ignored if TSX is high. Upon the completion
of a cell transfer, TENB may be held low because a
cell transfer is only initiated by assertion of TSX.
TENB must be low for 26 to 28 (depending on the
inclusion of optional words) cycles to transfer an entire
cell. TENB may be deasserted high at any time to
pause a cell transfer.
TENB is updated on the rising edge of TCLK.
TADR[11]
TADR[10]
TADR[9]
TADR[8]
TADR[7]
TADR[6]
TADR[5]
TADR[4]
TADR[3]
TADR[2]
TADR[1]
TADR[0]
Input T20 The TADR[11:0] signals are used to address logical
U21 channels for the purposes of polling.
V22
Upon sampling a TADR[11:3] value within one of the
W23
address ranges set by the Control Channel Base
U20
Address, Logical Channel Base Address and Logical
V21
Channel Address Range / Logical Channel Base
W22
Address MSB registers, TPA will be driven to indicate
Y23
the availability of the buffer segment addressed by
W21
TADR[4:0]. When TADR[11:3] does not match a
Y22
programmed address range, TPA becomes high
AA23
impedance.
Y21
The TADR[11:0] bus is sampled on the rising edge of
TCLK.
TSX
Input T21 The transmit start of cell (TSX) indication signal marks
the start of cell on the TDAT[15:0] data bus. When
TSX is high, the first word of the cell structure is
present on the TDAT[15:0] stream. TSX must be
asserted for each cell. An interrupt may be generated
if TSX is high during any word other than the expected
first word of the cell structure.
TSX is sampled on the rising edge of TCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
21
PMC [ PMC-SIERRA, INC ]
