TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
224
Agere Systems Inc.
11 M13/M23 MUX/DeMUX Registers
(continued)
Table 289. M13_DS3_CONTROL2, DS3 Control 2 (R/W)
Address
Bit
Name
Table 290. M13_TFEAC_CONTROL, Tx FEAC Control (R/W)
Function
Reset
Default
0x000
0
0x10093
15:7
6
RSVD
Reserved.
M23_STUFF_MODE Bit.
A logic 0 on this bit will cause the
M23 stuffing to be determined by the external stuff request;
otherwise, fixed stuffing is used.
M13_NSMI_MODE Bit.
A logic 1 of this bit will enable M13 to
receive and output Ds3 payload through a serial link.
M13_DS3_P_BER Bit.
The P bits and, in CBP mode, the CP
bits in the DS3 frame immediately following each 0 to 1 transi-
tion of the input SMPR_BER_INSERT (
Table 75 on page 68
)
are inverted if this bit is set to 1.
M13_CBIT2_ACT Bit.
This bit is used only in the C-Bit parity
mode.
In this mode, if it is 0, the second C bit of each DS3
frame, C2, is set to 1. Otherwise, the transmit value of C2 is
input through pin TCBDATA (E12).
M13_UNUSED_ACT Bit.
This bit is used only in the C-bit par-
ity mode. In this mode, if it is 0, the unused C bits of each DS3
frame (the fourth through sixth and the sixteenth through
twenty-first) are set to 1. Otherwise, the transmit values of
these bits are input through pin TCBDATA (E12).
M13_DS3_RAI_SEND
M13_DS3_RAI_SEND Bit.
The transmitted DS3 X bits are set
to the inverse of this bit during normal transmission.
M13_FEBE_ERR
M13_FEBE_ERR Bit.
This bit is used to force errors in the
transmitted DS3 FEBE indication. If the bit is set, all DS3
frames are transmitted with the FEBE bits set to 000.
M23_STUFF_MODE
5
M13_NSMI_MODE
0
4
M13_DS3_P_BER
0
3
M13_CBIT2_ACT
0
2
M13_UNUSED_ACT
0
1
0
0
0
Address
Bit
Name
Function
Reset
Default
0x00
0x0
0x10094 15:8
RSVD
Reserved.
M13_TFEAC_CTL.
The user can provision the M13 to trans-
mit continuous ones by setting M13_TFEAC_CTL to 00.
FEAC Signals.
TFEAC signals are transmitted continuously
by setting M13_TFEAC_CTL to 01, and M13_TFEAC_CODE
= x5x4x3x2x1x0, where x5x4x3x2x1x0 is the appropriate
value for the alarm or status codeword.
In order to activate a loopback, the user may set
M13_TFEAC_CTL = 11, and M13_TFEAC_CODE =
x5x4x3x2x1x0, where x5x4x3x2x1x0 is the appropriate value
for the loopback codeword. The M13 will then transmit 10
repetitions of the activate codeword, 0 000111 0 11111111,
followed by 10 repetitions of 0 x5x4x3x2x1x0 0 11111111.
After transmitting this 40 octet sequence, it will set
M13_TFEAC_DONE (
Table 229 on page 204
) to 1.
In order to deactivate a loopback, the user may set
M13_TFEAC_CTL = 10, and M13_TFEAC_CODE =
x5x4x3x2x1x0, where x5x4x3x2x1x0 is the appropriate value
for the loopback codeword. The M13 will then transmit 10
repetitions of the deactivate codeword, 0 011100 0 11111111,
followed by 10 repetitions of 0 x5x4x3x2x1x0 0 11111111.
After transmitting this 40 octet sequence, it will set
M13_TFEAC_DONE to 1.
7:6
M13_TFEAC_CTL[1:0]
5:0
M13_TFEAC_
CODE[5:0]
0x00