XRT86SH328_3 Datasheet, PDF (72/119 Pages) Exar Corporation – VOYAGER - T1 FRAMER + LIU REGISTER DESCRIPTION

XRT86SH328
VOYAGER - T1 FRAMER + LIU REGISTER DESCRIPTION
REV. 1.0.1
TABLE 66: BLOCK INTERRUPT STATUS REGISTER (BISR)
HEX ADDRESS: 0XNB00
BIT
FUNCTION
TYPE DEFAULT
DESCRIPTION-OPERATION
7 Reserved
For E1 mode only
6 LBCODE
RO
0
Loopback Code Block Interrupt Status
This bit indicates whether or not the Loopback Code block has an
interrupt request awaiting service.
0 - Indicates no outstanding Loopback Code Block interrupt request
is awaiting service
1 - Indicates the Loopback Code block has an interrupt request
awaiting service. Interrupt Service routine should branch to the inter-
rupt source and read the Loopback Code Interrupt Status register to
clear the interrupt
NOTE: This bit will be reset to 0 after the microprocessor has
performed a read to the Loopback Code Interrupt Status
Register.
5 Reserved
RO
0
Reserved
4 ONESEC
RO
0
One Second Interrupt Status
This bit indicates whether or not the framer has experienced a One
Second interrupt since the last read of this register.
0 = Indicates One Second interrupt has not occurred since the last
read of this register
1 = Indicates One Second interrupt has occurred since the last read
of this register
3 HDLC
RO
0
HDLC Block Interrupt Status
This bit indicates whether or not the HDLC block has any interrupt
request awaiting service.
0 = Indicates no outstanding HDLC block interrupt request is await-
ing service
1 = Indicates HDLC Block has an interrupt request awaiting service.
Interrupt Service routine should branch to the interrupt source and
read the corresponding Data LInk Status Registers to clear the inter-
rupt.
NOTE: This bit will be reset to 0 after the microprocessor has
performed a read to the corresponding Data Link Status
Registers that generated the interrupt.
2 SLIP
RO
0
Slip Buffer Block Interrupt Status
This bit indicates whether or not the Slip Buffer block has any out-
standing interrupt request awaiting service.
0 = Indicates no outstanding Slip Buffer Block interrupt request is
awaiting service
1 = Indicates Slip Buffer block has an interrupt request awaiting ser-
vice. Interrupt Service routine should branch to the interrupt source
and read the Slip Buffer Interrupt Status register (address 0xNB08)
to clear the interrupt
NOTE: This bit will be reset to 0 after the microprocessor has
performed a read to the Slip Buffer Interrupt Status
Register.
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