STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
Register 018H: TJAT Interrupt Status
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
Unused
Unused
Unused
Unused
Unused
OVRI
X
X
X
X
X
X
X
X
R
R
UNDI
UNDI:
The UNDI bit is asserted when an attempt is made to read data from the
transmit FIFO when the FIFO is already empty. When UNDI is a logic 1, an
underrun event has occurred. Reading this register will clear the UNDI bit to
logic 0.
OVRI:
The OVRI bit is asserted when an attempt is made to write data into the
transmit FIFO when the FIFO is already full. When OVRI is a logic 1, an
overrun event has occurred. Reading this register will clear the OVRI bit to
logic 0.
PROPRIETARY AND CONFIDENTIAL
119
PMC [ PMC-SIERRA, INC ]
