PM7364 Datasheet, PDF (26/325 Pages) PMC-Sierra, Inc – Frame Engine and Datalink Manager

RELEASED
DATA SHEET
PMC-1960758
Pin Name
RBCLK
TCLK[0]
TCLK[1]
TCLK[2]
TCLK[3]
TCLK[4]
TCLK[5]
TCLK[6]
TCLK[7]
TCLK[8]
TCLK[9]
TCLK[10]
TCLK[11]
TCLK[12]
TCLK[13]
TCLK[14]
TCLK[15]
TCLK[16]
TCLK[17]
TCLK[18]
TCLK[19]
TCLK[20]
TCLK[21]
TCLK[22]
TCLK[23]
TCLK[24]
TCLK[25]
TCLK[26]
TCLK[27]
TCLK[28]
TCLK[29]
TCLK[30]
TCLK[31]
PM7364 FREEDM-32
ISSUE 6
FRAME ENGINE AND DATA LINK MANAGER
Type
Pin
No.
Tristate G20
Output
Input
L19
L17
M19
N19
N18
P19
P18
R19
T20
R17
U20
T17
V17
W17
V16
W16
V15
Y15
U13
Y14
W13
Y13
W12
V11
W10
U10
W9
W8
V8
W7
V7
W6
Function
The receive BERT clock signal (RBCLK)
contains the receive bit error rate test clock.
RBCLK is a buffered version of the selected
one of the receive clock signals
(RCLK[31:0]). RBCLK may be tri-stated by
setting the RBEN bit in the FREEDM-32
Master BERT Control register low.
The transmit line clock signals (TCLK[31:0])
contain the transmit clocks for the 32
independently timed links. Processing of
the transmit links is on a priority basis, in
descending order from TCLK[0] to
TCLK[31]. Therefore, the highest rate link
should be connected to TCLK[0] and the
lowest to TCLK[31]. TD[31:0] is updated on
the falling edge of the corresponding
TCLK[31:0] clock.
For channelised T1 or E1 links, TCLK[n]
must be gapped during the framing bit (for
T1 interfaces) or during time-slot 0 (for E1
interfaces) of the TD[n] stream. The
FREEDM-32 uses the gapping information
to determine the time-slot alignment in the
transmit stream.
For unchannelised links, TCLK[n] must be
externally gapped during the bits or time-
slots that are not part of the transmission
format payload (i.e. not part of the HDLC
packet).
TCLK[31:3] is nominally a 50% duty cycle
clock between 0 and 10 MHz. TCLK[2:0] is
nominally a 50% duty cycle clock between 0
and 52 MHz. Typical values for TCLK[31:0]
include 1.544 MHz (for T1 links) and 2.048
MHz (for E1 links).
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMER’S INTERNAL USE 12