
Agere Systems Inc.
151
Data Sheet
May 2001
155/622/2488 Mbits/s Data Interface
TDAT042G5 SONET/SDH
Register Descriptions
(continued)
Core Registers
(continued)
Provisioning Registers
(continued)
Table 49. Register 0x0011: Channel (A
—
D) Control (R/W)
Reset default of register = 0x0000.
Table 50. Register 0x0012: Loopback Control (R/W)
Reset default of register = 0x0000.
Address
(Hex)
0011
Bit #
Name
Function
Reset
Default
0
15
EQ_CH_A
Equip Channel A.
1 = enable; 0 = disable, i.e., turns off
clock in Rx direction, except in the STS-48/STM-16
mode. This function is valid only for STS-12/STM-4 and
STS-3/STM-1 modes (no effect in Tx direction).
Reserved.
These bits must be written to their reset
default value (000).
Equip Channel B.
1 = enable; 0 = disable, i.e., turns off
clock in Rx direction, except in the STS-48/STM-16
mode. This function is valid only for STS-12/STM-4 and
STS-3/STM-1 modes (no effect in Tx direction).
Reserved.
These bits must be written to their reset
default value (000).
Equip Channel C.
1 = enable; 0 = disable, i.e., turns off
clock in Rx direction, except in the STS-48/STM-16
mode. This function is valid only for STS-12/STM-4 and
STS-3/STM-1 modes (no effect in Tx direction).
Reserved.
These bits must be written to their reset
default value (000).
Equip Channel D.
1 = enable; 0 = disable, i.e., turns off
clock in Rx direction, except in the STS-48/STM-16
mode. This function is valid only for STS-12/STM-4 and
OSTS-3/STM-1 modes (no effect in Tx direction).
Reserved.
These bits must be written to their reset
default value (000).
14
—
12
—
000
11
EQ_CH_B
0
10
—
8
—
000
7
EQ_CH_C
0
6
—
4
—
000
3
EQ_CH_D
0
2
—
0
—
000
Address
(Hex)
0012
Bit #
Name
Function
Reset
Default
0x0
15
—
12
LOOPBACK[3:0]_
CH_A
LOOPBACK[3:0]_
CH_B
LOOPBACK[3:0]_
CH_C
LOOPBACK[3:0]_
CH_D
Loopback Control.
Only the following combinations
are valid:
0000 = no loopbacks
0001 = SONET facility loopback
0010 = SONET terminal loopback
0100 = UTOPIA far-end loopback
1000 = UTOPIA near-end loopback
SONET facility loopback is only available in STS-3/
STM-1 and STS-12/STM-4 modes.
11
—
8
0x0
7
—
4
0x0
3
—
0
0x0