bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 171

• Manufacturer Part Number: bt8375kpf
• Description: Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
• Manufacturer: Conexant Systems, Inc.

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
LATCH_ERR
LATCH_ALM
ALM1 reports current status of receive alarms. Any change in the current status activates the corresponding
interrupt status bit [ISR7; addr 004].
RMYEL
N8370DSE
047— Alarm 1 Status (ALM1)
RMYEL
7
Enable ONESEC Latching of Errors—Determines the interval for which latched active errors
are held in error interrupt [ISR5; addr 006] and in pattern interrupt [ISR0; addr 00B] status.
Enable ONESEC Latching of Alarms—Determines the interval for which latched active
alarms remain held in alarm interrupt status [ISR7, ISR6; addr 004, 005].
Receive Multiframe Yellow Alarm—Real-time or integrated RMYEL status depends on the
selected framer mode and the Yellow Alarm integration mode [YEL_INTEG; addr 045]. Refer
to
must be configured for FDL operation and RDL1_EN set to one. Also, RBOP_START must be
set to one in register BOP [addr 0A0]. Refer to registers DL1_TS [addr 0A4] and DL1_CTL
[addr 0A6].
RYEL
Table 3-12
6
NOTE:
IER
IER
0
0
1
0
0
1
Table 3-12. Receive Yellow Alarm
for mode summary and
NOTE(S):
Therefore, RYEL and RMYEL do not accurately report alarms during receive loss of frame
alignment [RLOF; addr 047].
Receive Framer
—
Interrupt type determines rising edge or transition event.
5
FT/SF/SLC
LATCH_ALM
0 = no alarm
1 = receive multiframe Yellow Alarm
LATCH_ERR
Mode
T1DM
JYEL
CAS
ESF
FAS
Last known frame alignment is used to locate and monitor Yellow Alarms.
X
X
0
1
0
1
RAIS
4
Conexant
RYEL
Rising edge or transition
Rising edge or transition
Rising edge or transition
YB2
Y24
YB2
Table 3-13
YJ
Y0
Y0
YEL_INTEG = 0
Rising edge event
Rising edge event
Rising edge event
ISR Latched
ISR Latched
RALOS
3
for set/clear criteria. For YF detection, DL1
RMYEL
Y16
—
—
—
YF
—
RLOS
2
YB2_INT
YB2_INT
Y24_INT
Y0_INT
Y0_INT
YJ_INT
ONESEC interval
ONESEC interval
RYEL
ISR Hold Time
Until read clear
Until read clear
ISR Hold Time
Until read clear
Until read clear
YEL_INTEG = 1
RLOF
1
3.8 Receiver Registers
Y16_INT
RMYEL
YF_INT
—
—
—
—
SIGFRZ
0
3-53