BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 243

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
RFSLIP
RUSLIP
N8370DSE
Controlled RSLIP Event—RUSLIP and RFSLIP event status are latched active-high when
receive slip error is detected. Either event reports RSLIP error in ISR5 [addr 006]. Active-high
hold interval is defined by LATCH_ERR [addr 046]. Two types of errors are detected:
Uncontrolled RSLIP Event—See RFSLIP description.
RSBI Mode
Normal
1.
2.
Bypass
Elastic
Short
FSLIP = Controlled 1 frame slip on RPCMO data output. FSLIP affects
RPCMO, but does not change the alignment of system bus RFSYNC or
RMSYNC signals.
USLIP = Uncontrolled 1 to 256 bit slip on RPCMO. USLIP affects both
system bus data and sync outputs. RUSLIP and RFSLIP status depends on
the receive system bus configuration [RSB_CR; addr 0D1].
RUSLIP
—
0
0
1
0
0
1
0
1
Conexant
RFSLIP
—
1
0
1
0
0
0
0
0
RSLIP
USLIP
USLIP
USLIP
FSLIP
FSLIP
Event
none
none
none
—
—
Most recent slip error direction is
reported in RSDIR.
An uncontrolled slip can occur in
Normal mode due to a resync of the
SBI or, in T1 rate converted
applications, the active time slots
are reassigned. The former sets
RSDIR = 0; the latter sets
RSDIR = 1.
—
—
In Short-Delay mode, if the bus
clock is faster than receive clock,
the system bus resynchronizes and
USLIP is reported. If the receive
clock is faster, RSLIP reverts to
Normal mode and reports FSLIP
errors.
—
RFSLIP is not applicable (read zero
value) while the RSLIP buffer is
bypassed or configured as elastic
store. FSLIP or USLIP errors
reported upon Bypass mode
initialization should be ignored.
3.17 System Bus Registers
Notes
—
3-125