MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 64

• Manufacturer Part Number: MT9074AL
• Description: T1/E1/J1 Single Chip Transceiver
• Manufacturer: Zarlink Semiconductor, Inc.

MT9074
64
Bit
7
6
5
4
3
2
HDLC0I
HDLC1I
1SECI
5SECI
Name
LCDI
Table 69 - Interrupt Word Three
- - -
(Page 4, Address 1EH) (T1)
Unused.
HDLC0 Interrupt. Whenever an
unmasked HDLC0 interrupt occurs
(from the 4 kHz data link) this bit
goes high. Reading this register
clears this bit.
HDLC1 Interrupt. Whenever an
unmasked HDLC1 interrupt occurs
(from
signaling channel) this bit goes
high. Reading this register clears
this bit.
Loop Code Detected Interrupt.
When unmasked this interrupt bit
goes high whenever either the
loop up (00001) or loop down
(001) code has been detected on
the line for a period of 48
milliseconds. Reading this register
clears this bit.
One Second Status Interrupt.
When unmasked this interrupt bit
goes high whenever the 1SEC
status bit (page 3 address 12H bit
7) goes from low to high. Reading
this register clears this bit.
Five Second Status Interrupt.
When unmasked this interrupt bit
goes high whenever the 5 SEC
status bit goes from low to high.
Reading this register clears this
bit.
Functional Description
the
DS1
channel
24
Bit
1
0
BIOMI
Name
SIGI
Table 69 - Interrupt Word Three
(Page 4, Address 1EH) (T1)
Bit Oriented Message Interrupt.
When unmasked this interrupt bit
goes high whenever a pattern
111111110xxxxxx0
received on the FDL that is
different from the last message.
The new message must persist for
8
positions to be accepted as a valid
new
register clears this bit.
Signaling
unmasked this interrupt bit goes
high whenever a change of state
(optionally debounced - see DBEn
in the Data Link, Signaling Control
Word page 1 address 12H) is
detected in the signaling bits (AB
or ABCD) pattern. Reading this
register clears this bit.
out
Functional Description
message.
the
Interrupt.
last
Reading
Data Sheet
10
has
message
When
been
this