Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
3.17 System Bus Registers
0D8—Signaling Reinsertion Frame Offset (RSYNC_FRM)
7
6
5
4
3
2
1
0
—
—
—
OFFSET[14]
OFFSET[13]
OFFSET[12]
OFFSET[11]
OFFSET[10]
OFFSET[14:10]
RSB Sync Frame Offset—Selects which RSB frame number coincides with an RMSYNC
pulse in the range of frame 0–23. OFFSET specifies the frame in which RMSYNC is applied
as an input, or in which RMSYNC appears as an output—consequently locating RPCMO
signaling frames used for T1 robbed-bit (frames 6,12,18, and 24), or E1 CAS signaling
reinsertion. The only RPCMO channels affected are those with signaling insertion enabled
[INSERT; addr 0E0–0FF].
T1/E1N
OFFSET[14:10]
X0000
X0001
|
RMSYNC Pulse
RSB Frame 0
RSB Frame 1
|
0
0
|
0
0
1
1
|
X1110
X1111
00000
00001
|
RSB Frame 14
RSB Frame 15
RSB Frame 1
RSB Frame 2
|
1
1
10110
10111
RSB Frame 23
RSB Frame 24
0D9—Slip Buffer Status (SSTAT)
SSTAT[7:0] is updated at the start of each respective receive/transmit internal frame boundary (i.e., 125 µs
interval). Each bit in SSTAT is latched upon event detection and held until cleared by a processor read.
7
6
5
4
3
2
1
0
TSDIR
TFSLIP
TUSLIP
—
RSDIR
RFSLIP
RUSLIP
—
TSDIR
Transmit Slip Direction—TSDIR is updated each time a TSLIP error is latched in TFSLIP, and
TSDIR indicates which direction the slip occurred.
0 = TSLIP error deleted 1 frame on TX data output
1 = TSLIP error repeated 1 frame on TX data output
N8370DSE
Conexant
3-123
CONEXANT [ CONEXANT SYSTEMS, INC ]
