PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
Pin Name
Type
Input
Pin
No.
Function
TSOC
H19 The Transmit Start of Cell (TSOC) is an active high
signal that marks the first word of the cell on the
TDAT[15:0] bus.
The TSOC input is sampled on the rising edge of
TCLK.
TDAT[15]
TDAT[14]
TDAT[13]
TDAT[12]
TDAT[11]
TDAT[10]
TDAT[9]
TDAT[8]
TDAT[7]
TDAT[6]
TDAT[5]
TDAT[4]
TDAT[3]
TDAT[2]
TDAT[1]
TDAT[0]
Input
H21 The Transmit Cell Data (TDAT[15:0]) signals carry
H20 the ATM cell octets that are transferred to the
F19 internal cell buffer. The TDAT[15:0] signals are
G22 considered valid only when the TENB signal is
G21 asserted low. When this interface is operating in 8-
F22 bit mode, only TDAT[7:0] is used.
G20
The TDAT[15:0] input bus is sampled on the rising
F21
edge of TCLK.
E22
C20
E21
C22
E20
D21
C21
B22
TPRTY
Input
D20 The Transmit Parity (TPRTY) signal provides the
parity (programmable for odd or even parity) of the
TDAT[15:0] bus. The TPRTY signal is valid only
when valid data is transferring as indicated by the
TENB signal asserted low. When this interface is
operating in 8-bit mode, this signal provides the
parity of TDAT[7:0].
A parity error is indicated by a status bit and a
maskable interrupt.
The TPRTY input signal is sampled on the rising
edge of TCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
25
PMC [ PMC-SIERRA, INC ]
