RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
generates a frame pulse or a multi-frame pulse is determined by the value of
MF_SYNC_MODE in the LS_Ln_CFG_REG register for that line.
In normal mode (MVIP_EN bit is low in the LS_Ln_CFG_REG register for this
line), the first time TL_SYNC is sampled high after being low, indicates the
beginning of a frame or multi-frame. In MVIP-90 mode (MVIP_EN bit is set in
the LS_Ln_CFG_REG register for this line), the first time TL_SYNC is sampled
low after being high, indicates the beginning of a frame or multi-frame. For T1
structured data a frame is completed every 193 bits. For E1 structured data a
frame is completed every 32 bytes.
It is not necessary to provide an edge at the beginning of every frame or multi-
frame. However if a frame or multi-frame pulse is detected on a non-frame or
non-multi-frame boundary, then the AAL1gator-8 will resync to the new boundary
and there will be a temporary disruption of data being played out on the line.
In T1 mode a multi-frame can either be 12 or 24 frames depending on if the line
is in Super Frame (SF) or Extended Super Frame (ESF) mode. An E1 multi-
frame is 16 frames long. A special case of E1 mode exists that permits the use
of T1 signaling with E1 framing. When E1_WITH_T1_SIG is set in
LIN_STR_MODE and the line is in E1 mode, a multi-frame of 24 frames will be
used.
Signaling data is driven for all frames of any multi-frame and will change only on
multi-frame boundaries. For T1 mode, signaling data may change every 24th
frame. For E1 mode, signaling may change every 16th frame.
The signaling nibble is valid for each channel when the last nibble of each
channel’s data is being driven. See Figure 73 for an example of signaling bits in
a T1 frame. See Figure 74 for an example of signaling bits in the E1 mode.
The line interface block just passes the signaling and data bits from the A1SP
block to the external output pins.
Figure 73 Output of T1 Signaling Bits
Line Output Signals During Every
TL_SER
1
2
3
...
22
ABCD
23
ABCD
24
(timeslots
)
ABCD
XXXX
Channel 1
ABCD
ABCD
ABCD
XXXX
XXXX
TL_SIG
XXXX
...
XXXX
XXXX
...
Channel 2
Channel 21
Channel 22
Channel 23
Channel 0
XXXX - indicates signaling is
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