PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Pin Name
Type
Pin
No.
Function
DV5/RDN/RLCV[6]
Tristate
output
AB5
The SBI DROP bus payload indicator signal (DV5) locates the
position of the floating payloads for each tributary within the SBI
TDM bus structure. Timing differences between the port timing
and the TDM bus timing are indicated by adjustments of this
payload indicator relative to the fixed TDM bus structure.
Multiple LIU devices can drive this signal at uniquely assigned
tributary column positions. DV5 is tristated when the OCTLIU is
not outputting data on a particular tributary column.
DV5 is updated on the rising edge of REFCLK.
DV5 shares the same pin as the RDN/RLCV[6] output. DV5 is
selected when SBI_EN or SBI2CLK is tied high.
Output
Y4
The SBI DROP bus active indicator signal (DACTIVE) is asserted
whenever the OCTLIU is driving the SBI DROP bus signals,
DDATA[7:0], DDP, DPL and DV5.
DACTIVE/RDN/RLCV[8]
DACTIVE is updated on the rising edge of REFCLK.
DACTIVE shares the same pin as the RDN/RLCV[8] output.
DACTIVE is selected when SBI_EN or SBI2CLK is tied high.
Transmit Line Interface
TXTIP1[1]
TXTIP1[2]
TXTIP1[3]
TXTIP1[4]
TXTIP1[5]
TXTIP1[6]
TXTIP1[7]
TXTIP1[8]
Analogue A12
Transmit Analogue Positive Pulse (TXTIP1[8:1] and TXTIP2[8:1]).
When the transmit analogue line interface is enabled, the
TXTIP1[x] and TXTIP2[x] analogue outputs drive the transmit line
Output
K22
N22
AB12 pulse signal through an external matching transformer. Both
AB9
L1
H1
A9
TXTIP1[x] and TXTIP2[x] are normally connected to the positive
lead of the transformer primary. Two outputs are provided for
better signal integrity and must be shorted together on the board.
After a reset, TXTIP1[x] and TXTIP2[x] are high impedance. The
HIGHZ bit of the octant’s XLPG Line Driver Configuration register
must be programmed to logic 0 to remove the high impedance
state.
TXTIP2[1]
TXTIP2[2]
TXTIP2[3]
TXTIP2[4]
TXTIP2[5]
TXTIP2[6]
TXTIP2[7]
TXTIP2[8]
A11
L22
M22
AB11
AB10
K1
J1
A10
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
18
PMC [ PMC-SIERRA, INC ]
