PM4318 Datasheet, PDF (120/244 Pages) PMC-Sierra, Inc – OCTAL E1/T1/J1 LINE INTERFACE DEVICE

PRELIMINARY
DATASHEET
PMC- 2001578
ISSUE 3
PM4318 OCTLIU
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Register 043H, 0C3H, 143H, 1C3H, 243H, 2C3H, 343H, 3C3H:
T1 PDVD Interrupt Enable/Status
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Type
R
R
R
R/W
R/W
Function
Unused
Unused
Unused
PDV
Z16DI
PDVI
Z16DE
PDVE
Default
X
X
X
X
X
X
0
0
When the E1/T1B bit of the Global Configuration register is a logic 1, this register is held reset.
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. When PDV is a logic 0, no violation of
the pulse density rule exists. Note: the PDV indication persists for the duration of the pulse
density violation. At its minimum, PDV may be asserted for only 1 bit time, therefore, reading
this bit may not return a logic 1 even though a pulse density violation has occurred.
PDVI, Z16DI:
The PDVI and Z16DI bits identify the source of a generated interrupt. PDVI is a logic 1
whenever a change in the pulse density violation indication generated an interrupt. PDVI is
cleared to 0 when this register is read. Z16DI is a logic 1 whenever 16 consecutive zeros are
detected. Z16DI is cleared to 0 when this register is read. Note that the PDVI and Z16DI
interrupt indications operate regardless of whether interrupts are enabled or disabled.
Z16DE:
The Z16DE bit enables an interrupt to be generated on the microprocessor INTB pin when 16
consecutive zeros are detected. When Z16DE is set to logic 1, interrupt generation is
enabled. When Z16DE is set to logic 0, interrupt generation is disabled.
PDVE:
The PDVE bit enables an interrupt to be generated on the microprocessor INTB pin when a
change in the pulse density is detected. When PDVE is set to logic 1, an interrupt is
generated whenever a pulse density violation occurs or when the pulse density ceases to
exist. When PDVE is set to logic 0, interrupt generation by pulse density violations is
disabled.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
111