cx28394 Conexant Systems, Inc., cx28394 Datasheet - Page 233

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

CX28394/28395/28398
Quad/x16/Octal—T1/E1/J1 Framers
TLOOP
Table 3-23. Remote DS0 Channel Loopback
Table 3-24. Signaling Loopback
TIDLE
TLOCAL
TSIGA–TSIGD
TSIGO
RSIGO
100054E
NOTE(S):
TLOCAL
NOTE(S):
TLOOP
0
0
1
1
0
0
0
1
If RX Signaling, then RSIGn output buffer supplies transmit signaling.
If RX Signaling, then RSIGn output buffer supplies transmit signaling.
TSIGO
TIDLE
0
0
1
X
0
1
0
1
Remote DS0 Channel Loopback—Transmit data supplied from RSLIP buffer contents.
TLOOP works in conjunction with other TPCn control bits to select the source of transmitted
data and signaling (see
Transmit Idle—Transmit data supplied from TSLIP_LO buffer contents. The processor writes
an 8-bit idle pattern to TSLIP_LO for output on the selected time slot or optionally writes
real-time data output to TSLIP_LO after each TFRAME interrupt [ISR3; addr 008]. Only the
TSLIP_HI buffer is updated from TPCMI to allow continued local DS0 channel loopback.
Transmit Local Signaling—When active, TLOCAL transmits TSIGA–TSIGD values in output
ABCD signaling bits.
Transmit Local Signaling—Holds the 4-bit ABCD signaling value, which is output when
TLOCAL is active. In AB only applications, such as T1/SF framing, TSIGC and TSIGD must
also be written with the same data as TSIGA and TSIGB. In E1 modes, TS0 and TS16 local
signaling value determines CAS multiframe alignment signal (MAS) and XYXX output.
Transmit Signaling Output—Applicable only if TLOCAL is inactive. ABCD signaling from
TSIGn buffer is transmitted.
Receive Signaling Output—Applicable only if TLOCAL is inactive. Forces transmit ABCD
signaling to be supplied from RSIGn buffer, affecting a remote signaling loopback.
0 = normal data output
1 = transmit idle data output
0 = TSIGO or RSIGO control output signaling
1 = transmit signaling from TSIGA–TSIGD
0 = no effect
1 = transmit signaling from TSIGn buffer
0 = no effect
1 = transmit signaling from RSIGn buffer
RSIGO
Data Source
X
0
1
0
TSLIP_LO
TSLIP_LO
RXDATA
TPCMI
Sig Source
TSIGA–D
RSIGn
TSIGn
None
Table
Normal
Transmit Idle
Remote Loop
Transmit Idle
3-23).
No Transmit Signaling
Remote Signaling Loopback
TX Signaling Loopback
Local Signaling
Channel Mode
Conexant
Signaling Mode
3.16 System Bus Registers
3.0 Registers
3-111