3.0 Registers
CX28394/28395/28398
3.7 Primary Control and Status Registers
Quad/x16/Octal—T1/E1/J1 Framers
TFSYNC_IO
Bidirectional TFSYNC Input/Output Mode—TFSYNC_IO programming is dependent on
transmit framer and system bus modes as shown in Tables 3-9 and 3-10.
0 = TFSYNC input
1 = TFSYNC output
TMSYNC_IO
Bidirectional TMSYNC Input/Output mode—TMSYNC_IO programming is dependent on
transmit framer and system bus modes as shown in Tables 3-9 and 3-10.
0 = TMSYNC input
1 = TMSYNC output
Table 3-9. System Bus Sync Mode Summary
FSYNC
MSYNC
SBI Alignment Mode
IN
IN
SBI supplies multiframe and 8 kHz frame alignment. FSYNC must be aligned with
MSYNC if both are provided.
IN
IN-GND
SBI supplies 8 kHz frame alignment. Multiframe alignment is arbitrary and MSYNC is
unused.
IN
IN-GND
OUT
OUT
OUT
IN
SBI supplies 8 kHz frame alignment. Multiframe alignment is supplied by the framer.
Framer supplies multiframe alignment. FSYNC is unused.
SBI supplies multiframe and frame alignment.
OUT
OUT
Framer supplies frame and multiframe alignment.
Table 3-10. Common TFSYNC and TMSYNC Configurations
Conditions
TFSYNC
TMSYNC
Explanation
Transmit framer disabled.
(TABORT = 1)
IN
IN-GND
IN
IN
IN
TSB timebase slaved to system bus TFSYNC or TMSYNC.
TSB timebase slaved to system bus TMSYNC. TFSYNC is unused.
IN-GND
TSB timebase slaved to system bus TFSYNC. TMSYNC is unused
and multiframe alignment is arbitrary.
IN
OUT
SB timebase slaved to system bus TFSYNC. TMSYNC alignment is
arbitrary.
OUT
OUT
OUT
IN
TSB timebase alignment is arbitrary.
TSB timebase slaved to system bus TMSYNC. TFSYNC aligns to
TMSYNC input.
Transmit framer enabled to
search TPCMI for
OUT
OUT
TSB timebase is aligned to embedded framing on TPCMI. TPCMI
must be configured to line rate for this case.
embedded framing.
(EMBED = 0, TABORT = 0)
Transmit framer enabled to
search TNRZ (after TSLIP
buffer) for embedded
framing. (EMBED = 1,
TABORT = 0)
OUT
IN-GND
TSB timebase is aligned to embedded framing on TNRZ data.
TMSYNC is unused. TPCMI may be configured for 1,544 kbps or a
multiple of 2,048 kbps.
3-32
Conexant
100054E
CONEXANT [ CONEXANT SYSTEMS, INC ]
