PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
Pin Name
Type
Pin
No.
Function
RDAT[15]
RDAT[14]
RDAT[13]
RDAT[12]
RDAT[11]
RDAT[10]
RDAT[9]
RDAT[8]
RDAT[7]
RDAT[6]
RDAT[5]
RDAT[4]
RDAT[3]
RDAT[2]
RDAT[1]
RDAT[0]
Output
U22 The Receive Cell Data (RDAT[15:0]) signals carry
T22 the ATM cell words that have been read from the
U19 S/UNI-IMA-8 internal cell buffers. When this
R20 interface is operating in 8-bit mode, the data is
R22 carried on RDAT[7:0].
T19
The RDAT[15:0] output bus is updated on the rising
R19
edge of RCLK.
P20
P21
P22
P19
N20
N21
N22
N19
M20
RPRTY
Output
M22 The Receive Parity (RPRTY) signal provides the
parity (programmable for odd or even parity) of the
RDAT[15:0] bus. When the interface is operating in
8-bit mode, the parity is calculated over RDAT[7:0]
The RPRTY output is updated on the rising edge of
RCLK.
9.1 Receive Slave ATM Interface (UTOPIA L2 mode) (26 Signals)
Pin Name
Type
Pin
No.
Function
RCLK
Input
T21
The Receive Clock (RCLK) signal is used to
transfer data blocks from the S/UNI-IMA-8 across
the receive UTOPIA L2 interface.
The RCA, RSOC, RDAT[15:0], and RPRTY outputs
are updated on the rising edge of RCLK. The RENB
and RADR[4:0] inputs are sampled on the rising
edge of RCLK.
The RCLK input must cycle at a 52 MHz or lower
instantaneous rate.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
18
PMC [ PMC-SIERRA, INC ]
