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IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT INDUSTRIAL TEMPERATURE RANGES
e-LBCF: Inband Loopback Configuration Register
(1)
(R/W, Expanded Address = 08H)
1.
This register is global control.
Symbol Position Default Description
-LBCF.7-600
0 = Normal Operation. (Default)
1 = Reserved.
LBDE LBCF.5 0
Loopback Detector Enable
0 = Inband loopback code detection is disabled. (Default)
1 = Inband loopback code detection is enabled.
ALBE LBCF.4 0
Automatic Loopback Enable
0 = Automatic Inband Loopback disabled.
1 = Automatic Inband Loopback enabled.
LBAL[1:0] LBCF.3-2 00
Loopback Activate Code Length
00 = 5-bit long activate code in LBAC[7:3] is effective.
01 = 6-bit long activate code in LBAC[7:2] is effective.
10 = 7-bit long activate code in LBAC[7:1] is effective.
11 = 8-bit long activate code in LBAC[7:0] is effective.
LBDL[1:0] LBCF.1-0 00
Loopback Deactivate Code Length
00 = 5-bit long deactivate code in LBDC[7:3] is effective.
01 = 6-bit long deactivate code in LBDC[7:2] is effective.
10 = 7-bit long deactivate code in LBDC[7:1] is effective.
11 = 8-bit long deactivate code in LBDC[7:0] is effective.
e-LBAC: Inband Loopback Activation Code Register
(1)(2)
(R/W, Expanded Address = 09H)
1.
When setting a value in e-LBAC or e-LBDC that is less than 8 bits, the most significant bits must be replicated in the unused least significant bits. e.g. if setting a 5-bit code = 11000,
the register value should be 11000110. Here b7 is repeated in b2; b6 is repeated in b1; b5 is repeated in b0.
2.
This register is global control.
Symbol Position Default Description
LBAC[7:0] LBAC.7-0 00H
LBAC[7:0] = 8-bit (or 4-bit) repeating activate code is programmed with the length limitation in LBAL[1:0].
LBAC[7:1] = 7-bit repeating activate code is programmed with the length limitation in LBAL[1:0].
LBAC[7:2] = 6-bit (or 3-bit) repeating activate code is programmed with the length limitation in LBAL[1:0].
LBAC[7:3] = 5-bit repeating activate code is programmed with the length limitation in LBAL[1:0].
e-LBDC: Inband Loopback Deactivation Code Register
(1)(2)
(R/W, Expanded Address = 0AH)
1.
When setting a value in e-LBAC or e-LBDC that is less than 8 bits, the most significant bits must be replicated in the unused least significant bits. e.g. if setting a 5-bit code = 11000, the
register value should be 11000110. Here b7 is repeated in b2; b6 is repeated in b1; b5 is repeated in b0.
2.
This register is global control.
Symbol Position Default Description
LBDC[7:0] LBDC.7-0 00H
LBDC[7:0] = 8-bit (or 4-bit) repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits.
LBDC[7:1] = 7-bit repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits.
LBDC[7:2] = 6-bit (or 3-bit) repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits.
LBDC[7:3] = 5-bit repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits.
e-LBS: Inband Loopback Receive Status Register (R, Expanded Address = 0BH)
Symbol Position Default Description
LBS[7:0] LBS.7-0 00H
0 = Normal operation (Default). Or loopback deactivation code detected.
1 = Loopback activation code detected.
e-LBM: Inband Loopback Interrupt Mask Register (R/W, Expanded Address = 0CH)
Symbol Position Default Description
LBM[7:0] LBM.7-0 00H
0 = LBI interrupt is not allowed (Default)
1 = LBI interrupt is allowed.
