XRT75R12
REV. P1.0.2
PRELIMINARY
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
83
T
ABLE
45: E
RROR
C
OUNTER
H
OLDING
R
EGISTER
- C
HANNEL
N
A
DDRESS
L
OCATION
= 0
XM
C
Each channel contains a dedicated 16 bit PRBS error counter. When enabled this counter will accumulate
PRBS errors (as well as excess zeros and LCVs). The LS byte will "carry" a one over to the MS byte each time
it rolls over from 255 to zero until the MS byte also reaches 255. When both counters reach 255, no further
errors will be accumulated and "all ones" will signify an overflow condition.
The counter can be read while in the active count mode. Either register may be read "on the fly" and the other
byte will be simultaneously transferred into the channel’s Error Holding register. The holding register may then
be read to supply the Host with a correct 16 bit count (as of the instant of reading). With this mechanism, the
Host could rapidly cycle thru reading all twelve counters in order (storing the read byte in scratch RAM) and
then come back and read the second byte from each holding register to form the 16 bit accumulation in the
Host system.
0x7-
0x8-
APST
IER6
ISR6
AS6
TC6
RC6
CC6
JA6
APSR
EM6
EL6
EH6
0
X
9-
IER7
ISR7
AS7
TC7
RC7
CC7
JA7
EM7
EL7
EH7
0xA-
IER8
ISR8
AS8
TC8
RC8
CC8
JA8
EM8
EL8
EH8
0xB-
IER9
ISR9
AS9
TC9
RC9
CC9
JA9
EM9
EL9
EH9
0xC-
IER10
ISR10
AS10
TC10
RC10
CC10
JA10
EM10
EL10
EH10
0xD-
IER11
ISR11
AS11
TC11
RC11
CC11
JA11
EM11
EL11
EH11
0xE-
CIE
CIS
0xF-
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Msb
Ls bit
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
A
DDRESS
L
OCATION
0
1
2
3
4
5
6
7
8
9
A
B
C
D E
F
相關(guān)PDF資料
PDF描述
XRT75R12IB TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75VL00 E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75VL00IV E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT79L71 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L71IB 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT75R12_07 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
XRT75R12_0710 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
XRT75R12D 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET
XRT75R12D_06 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET
XRT75R12D_07 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET
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