XRT79L71 Datasheet, PDF (170/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
PRELIMINARY
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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
RXE3 INTERRUPT STATUS REGISTER # 1 - G.832 (DIRECT ADDRESS = 0X1114)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Unused
Change in
SSM MSG
Interrupt
Status
Change in
SSM OOS
Interrupt
Status
COFA
Interrupt
Status
Change in
OOF State
Interrupt
Status
Change in
LOF State
Interrupt
Status
Change in
LOS State
Interrupt
Status
R/O
RUR
RUR
RUR
RUR
RUR
RUR
0
0
0
0
0
0
0
BIT 0
Change in
AIS State
Interrupt
Status
RUR
0
BIT NUMBER
NAME
7
Unused
6
Change in SSM MSG
Interrupt Status
5
Change in SSM OOS
State Interrupt Status
TYPE
R/O
RUR
RUR
DESCRIPTION
Change in SSM (Synchronization Status Message) Interrupt
Status:
This RESET-upon-READ bit-field indicates whether or not the
"Change in SSM Message" Interrupt has occurred since the last
read of this register.
If this interrupt is enabled, then the DS3/E3 Framer block will
generate an interrupt, anytime it detects a change in the
"SSM[3:0]" value that it has received via the incoming E3 data-
stream.
0 - Indicates that the "Change in SSM Message" Interrupt has
NOT occurred since the last read of this register.
1 - Indicates that the "Change in SSM Message" Interrupt has
occurred since the last read of this register.
NOTE: The user can obtain the newly received value for "SSM"
by reading out the contents of Bits 3 through 1
(RxSSM[3:0]) within the "RxE3 SSM Register - G.832"
(Indirect Address =0xNE, 0x2C; Direct Address =
0x112C).
Change in SSM OOS (Out of Sequence) State Interrupt Sta-
tus:
This RESET-upon-READ bit-field indicates whether or not the
"Change in SSM OOS State" Interrupt has occurred since the
last read of this register.
If this interrupt is enabled, then the DS3/E3 Framer block will
generate the "Change in SSM OOS State" Interrupt will
response to the following events.
• When the DS3/E3 Frame Synchronizer block declares the
SSM OOS Condition.
• When the DS3/E3 Frame Synchronizer block clears the SSM
OOS condition.
0 - Indicates that the "Change in SSM OOS Condition" Interrupt
has NOT occurred since the last read of this register.
1 - Indicates that the "Change in SSM OOS Condition" Interrupt
has occurred since the last read of this register.
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