STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
Register 000H: Global Configuration
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PIO_OE
PIO
1
0
0
0
0
0
0
0
IBCD_IDLE
RSYNC_ALOSB
OOSMFAIS
TRKEN
RXMTKC
E1/T1B
PIO_OE:
The programmable I/O output enable, PIO_OE, bit controls the PIO pin.
When PIO_OE is logic 1, the PIO pin is configured as an output and driven
by the COMET. When PIO_OE is logic 0, the PIO pin is configured as an
input. Upon reset, the PIO pin is configured as an output.
PIO:
The programmable I/O, PIO, bit controls/reflects the state of the PIO pin.
When the PIO pin is configured as an output, the PIO bit controls the state of
the PIO pin. When the PIO pin is configured as an input, the PIO bit reflects
the state of the PIO pin. Upon reset, the PIO pin has an output value of
logic 0.
OOSMFAIS:
In E1 mode, this bit controls the receive backplane signaling trunk
conditioning in an out of signaling multiframe condition. If OOSMFAIS is set
to a logic 0, an OOSMF indication from the E1-FRMR does not affect the
BRSIG output. When OOSMFAIS is a logic 1, an OOSMF indication from the
E1-FRMR will cause the BRSIG output to be set to all 1's.
RSYNC_ALOSB:
The RSYNC_ALOSB bit controls the source of the loss of signal condition
used to control the behaviour of the receive reference presented on the
RSYNC. If RSYNC_ALOSB is a logic 0, analog loss of signal is used. If
RSYNC_ALOSB is a logic 1, digital loss of signal is used. When COMET is
in a loss of signal state, the RSYNC output is derived from XCLK. When
PROPRIETARY AND CONFIDENTIAL
76
PMC [ PMC-SIERRA, INC ]
