PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
12
OPERATION
12.1 Configuring the OCTLIU from Reset
After a system reset (either via the RSTB pin or via the RESET register bit), the OCTLIU will
default to the following settings:
Table 19 – Default Settings
Setting
Receiver Section
Transmitter Section
T1/E1 mode
Line Code
T1
T1
B8ZS
B8ZS
Line interface
Pins RXTIP[x] and
RXRING[x] active short haul
analogue inputs
TXTIP1[x], TXTIP2[x],
TXRING1[x], TXRING2[x]
tristated
Timing Options
Not applicable
Jitter attenuation enabled,
with output clock frequency
referenced to TCLK[n]
Diagnostics
All diagnostic modes
disabled
All diagnostic modes
disabled
12.2 Servicing Interrupts
The OCTLIU will assert INTB to logic 0 when a condition that is configured to produce an interrupt
occurs. To find which condition caused this interrupt to occur, the procedure outlined below
should be followed:
1. Read the bits of the Master Interrupt Source registers (002H and 003H) to identify which
octants and/or SBI interface blocks generated the interrupt. For example, a logic one read in
the LIU[2] bit of the Master Interrupt Source #1 register indicates that octant #2 produced the
interrupt.
2. Read the bits of the second level Line Interface Interrupt Source registers to identify the block
within the octant generating the interrupt.
The Interrupt Source registers for octant #1 are at addresses 00CH and 00DH.
The Interrupt Source registers for octant #2 are at addresses 08CH and 08DH.
The Interrupt Source registers for octant #3 are at addresses 10CH and 10DH.
The Interrupt Source registers for octant #4 are at addresses 18CH and 18DH.
The Interrupt Source registers for octant #5 are at addresses 20CH and 20DH.
The Interrupt Source registers for octant #6 are at addresses 28CH and 28DH.
The Interrupt Source registers for octant #7 are at addresses 30CH and 30DH.
The Interrupt Source registers for octant #8 are at addresses 38CH and 38DH.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
172
PMC [ PMC-SIERRA, INC ]
