PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Register 59H: XPDE Interrupt Enable/Status
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
R/W
R
STUFE
STUFF
STUFI
PDV
0
0
X
X
X
X
0
R
R
Z16DI
PDVI
R
R/W
R/W
Z16DE
PDVE
0
STUFE:
The STUFE bit enables the occurrence of pulse stuffing to generate an
interrupt on INTB. When STUFE is set to logic 1, an interrupt is generated on
the occurrence of a bit stuff. When STUFE is a logic 0, bit stuffing
occurrences do not generate an interrupt on INTB.
STUFF:
The STUFF bit enables pulse stuffing to occur upon detection of a violation of
the pulse density rule. Bit stuffing is performed in such a way that the
resulting data stream no longer violates the pulse density rule. When STUFF
is set to logic 1, bit stuffing is enabled and the STUFI bit indicates the
occurrence of bit stuffs. When STUFF is a logic 0, bit stuffing is disabled and
the PDVI bit indicates occurrences of pulse density violation. Also, when
STUFF is a logic 0, PCM data passes through XPDE unaltered.
STUFI:
The STUFI bit is valid when pulse stuffing is active.This bit indicates when a
bit stuff occurred to eliminate a pulse density violation and that an interrupt
was generated due to the bit stuff (if STUFE is logic 1). When pulse stuffing is
active, PDVI remains logic 0, indicating that the stuffing has removed the
density violation. The STUFI bit is reset to logic 0 once this register is read. If
the STUFE bit is also logic 1, the interrupt is also cleared once this register is
read.
PDV:
The PDV bit indicates the current state of the pulse density violation
indication. When PDV is a logic 1, a violation of the pulse density rule exists.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
186
PMC [ PMC-SIERRA, INC ]
