PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Register 051H, 0D1H, 151H, 1D1H, 251H, 2D1H, 351H, 3D1H: IBCD Interrupt Enable/Status
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R
R
LBACP
LBDCP
LBAE
LBDE
LBAI
X
X
0
R/W
R/W
R
0
X
X
X
X
R
LBDI
R
LBA
R
LBD
When the E1/T1B bit of the Global Configuration register is a logic 1, this register is held reset.
LBACP, LBDCP:
The LBACP and LBDCP bits indicate when the corresponding loopback code is present
during a 39.8 ms interval.
LBAE:
The LBAE bit enables the assertion or deassertion of the inband Loopback Activate (LBA)
detect indication to generate an interrupt on the microprocessor INTB pin. When LBAE is set
to logic 1, any change in the state of the LBA detect indication generates an interrupt. When
LBAE is set to logic 0, no interrupt is generated by changes in the LBA detect state.
LBDE:
The LBDE bit enables the assertion or deassertion of the inband Loopback Deactivate (LBD)
detect indication to generate an interrupt on the microprocessor INTB pin. When LBDE is set
to logic 1, any change in the state of the LBD detect indication generates an interrupt. When
LBDE is set to logic 0, no interrupt is generated by changes in the LBD detect state.
LBAI, LBDI:
The LBAI and LBDI bits indicate which of the two expected loopback codes generated the
interrupt when their state changed. A logic 1 in these bit positions indicates that a state
change in that code has generated an interrupt; a logic 0 in these bit positions indicates that
no state change has occurred. After the Enable/Status Register has been read, the LBAI and
LBDI bits are set to logic 0.
LBA, LBD:
The LBA and LBD bits indicate the current state of the corresponding loopback code detect
indication. A logic 1 in these bit positions indicates the presence of that code has been
detected; a logic 0 in these bit positions indicates the absence of that code.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
127
PMC [ PMC-SIERRA, INC ]
