STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
212
Register 065H: T1 PDVD Interrupt Enable/Status
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
Unused
Unused
PDV
Z16DI
PDVI
Z16DE
PDVE
X
X
X
0
0
0
0
0
R
R
R
R/W
R/W
When the E1/T1B bit of the Global Configuration register is a logic 1, this register
is held reset. Also, this register is only available when the RUNI bit in the Receive
Line Interface Configuration register is logic 0.
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 is generation is enabled. When Z16DE is set to logic 0,
interrupt generation is disabled.