cx28394 Conexant Systems, Inc., cx28394 Datasheet - Page 224

• Manufacturer Part Number: cx28394
• Description: Quad/x16/octal-t1/e1/j1 Framers
• Manufacturer: Conexant Systems, Inc.

3.0 Registers
3.16 System Bus Registers
SET_RSIG
SET_SIG
UNICODE
3-102
0D7—Receive Signaling Configuration (RSIG_CR)
—
7
SET_RSIG
Force 2 ms RSIG Interrupt—Allows the processor to receive an interrupt on RSIG [addr 008]
at every CAS multiframe boundary. Applicable only to E1 mode with CAS enabled. Overrides
STACK interrupt.
Overwrite Robbed-Bit Signaling—Applicable only during T1 mode and function dependent
on RIDLE. When RIDLE is inactive, SET_SIG forces received robbed-bit signaling to one
before updating RSLIP time slot value. Therefore, bit 8 of each time slot received during
signaling frames 6, 12, 18, and 24 is replaced with a one. This function is particularly useful in
cross-connect and exchange systems that strip robbed-bit signaling or use different signaling
frame alignment on inbound and outbound ports.
Inband Signaling Freeze (applicable to T1 modes only)—If UNICODE is enabled, received
ABCD signaling on all channels is searched on a per-channel basis for the 4-bit UNICODE
pattern. UNICODE pattern detection inhibits STACK. RSIG buffer updates for that channel as
long as UNICODE is present, but does not affect SIGFRZ output and is not reported to the
processor. This function is described in Bellcore TR-TSY-000303, Section 4.4.9, Revision 2,
July 1989.
0 = RSIG interrupt on signaling STACK change
1 = RSIG interrupts every 2 ms at CAS multiframe
0 = no change to receive signaling
1 = replace robbed-bit signaling
0 = no effect
1 = enable UNICODE detection and per-channel signaling freeze
6
NOTE(S):
TFSYNC and TMSYNC outputs.
OFFSET[9:5]
11110
11110
11110
11111
11111
11111
11111
Offsets which are outside the TSB timebase range result in no pulses on
SET_SIG
5
OFFSET[4:3]
8192 Kbps/sec SBI Mode
UNICODE
01
10
11
00
01
10
11
4
Conexant
DEBOUNCE
TSYNC Time
3
Slot
30
30
30
31
31
31
31
FRZ_OFF
2
Quad/x16/Octal—T1/E1/J1 Framers
Group
B
C
D
A
B
C
D
CX28394/28395/28398
FRZ_ON
1
THRU
100054E
0