
PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE
94
Register 002H, 102H, 202H, 302H: S/UNI-QJET Transmit Configuration
Bit
Type
Function
Default
Bit 7
R/W
TFRM[1]
0
Bit 6
R/W
TFRM[0]
0
Bit 5
R/W
TXREF
0
Bit 4
R/W
TICLK
0
Bit 3
R/W
TUNI
0
Bit 2
R/W
TCLKINV
0
Bit 1
R/W
TPOSINV
0
Bit 0
R/W
TNEGINV
0
TNEGINV:
The TNEGINV bit provides polarity control for outputs TNEG/TOHM. When a
logic 0 is written to TNEGINV, the TNEG/TOHM output is not inverted. When
a logic 1 is written to TNEGINV, the TNEG/TOHM output is inverted. The
TNEGINV bit setting does not affect the loopback data in diagnostic loopback.
TPOSINV:
The TPOSINV bit provides polarity control for outputs TPOS/TDATO. When a
logic 0 is written to TPOSINV , the TPOS/TDATO output is not inverted. When
a logic 1 is written to TPOSINV , the TPOS/TDATO output is inverted. The
TPOSINV bit setting does not affect the loopback data in diagnostic loopback.
TCLKINV:
The TCLKINV bit provides polarity control for output TCLK. When a logic 0 is
written to TCLKINV, TCLK is not inverted and outputs TPOS/TDATO and
TNEG/TOHM are updated on the falling edge of TCLK. When a logic 1 is
written to TCLKINV, TCLK is inverted and outputs TPOS/TDATO and
TNEG/TOHM are updated on the rising edge of TCLK.
TUNI:
The TUNI bit enables the S/UNI-QJET to transmit unipolar or bipolar DS3, E3,
or J2 data streams. When a logic 1 is written to TUNI, the S/UNI-QJET
transmits unipolar DS3, E3, or J2 data on TDATO. When TUNI is logic 1, the
TOHM output indicates the start of the DS3 M-Frame (the X1 bit), the start of
the E3 frame (bit 1 of the frame), or the first framing bit of the J2 multiframe.