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參數(shù)資料
| 型號： | XRT73LC04A |
| 廠商： | Exar Corporation |
| 英文描述： | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| 中文描述： | 4通道DS3/E3/STS-1線路接口單元 |
| 文件頁數(shù)： | 31/64頁 |
| 文件大?。?/td> | 360K |
| 代理商： | XRT73LC04A |
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XRT73LC04A
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.1
27
Address:
The register addresses are presented in the
Hexa-
decimal
format.
Type:
The Command Registers are either Read-Only (RO)
type of registers or Read/Write (R/W) type of regis-
ters.
The default value for each of the bit-fields within these reg-
isters is "0".
a. Operating in the Hardware Mode.
In order to configure individual Channels into the ap-
propriate mode, set the E3_(n), and the STS-1/
DS3_(n) input pins (where n = 0, 1, 2, or 3) to the ap-
propriate logic states, as presented below inTable 3.
b. Operating in the HOST Mode.
To configure a Channel into the appropriate mode,
write the appropriate values into the STS-1/DS3_(n)
and E3_(n) bit-fields within the Command Register
CR4-(n), as illustrated below (refer to Table 2 for the
correct address for each channel).
COMMAND REGISTER, CR4-(n)
Table 4 relates the values of these two bit-fields to the
selected data rates.
T
ABLE
4: S
ELECTING
THE
D
ATA
R
ATE
FOR
C
HANNEL
(n)
VIA
THE
STS-1/DS3_(n)
AND
THE
E3_(n)
BIT
-
FIELDS
WITHIN
THE
A
PPROPRIATE
C
OMMAND
R
EGISTER
(HOST
M
ODE
)
C
HANNEL
3
0x18
CR0-3
RO
RLOL_3
RLOS_3
ALOS_3
DLOS_3
DMO_3
0x19
CR1-3
R/W
TxOFF_3
TAOS_3
TxClkINV_3
TxLEV_3
Reserved
0x1A
CR2-3
R/W
Reserved
Reserved
ALOSDIS_3
DLOSDIS_3
REQEN_3
0x1B
CR3-3
R/W
(SR/DR)_3
LOSMUT_3
RxOFF
RxClk_3INV
Reserved
0x1C
CR4-3
R/W
Reserved
STS-1/DS3_3
E3_3
LLB_3
RLB_3
0x1D
CR5-3
R/W
Reserved
Reserved
Reserved
Reserved
Reserved
0x1E
CR6-3
R/W
Reserved
Reserved
Reserved
Reserved
Reserved
0x1F
CR7-3
R/W
Reserved
Reserved
Reserved
Reserved
Reserved
T
ABLE
2: H
EXADECIMAL
A
DDRESSES
AND
B
IT
F
ORMATS
OF
XRT73LC04A C
OMMAND
R
EGISTERS
R
EGISTER
B
IT
-F
ORMAT
ADDRESS
COMMAND
REGISTER
TYPE
D4
D3
D2
D1
D0
T
ABLE
3: S
ELECTING
THE
D
ATA
R
ATE
FOR
C
HANNEL
(n)
VIA
THE
E3_(n)
AND
STS-1/DS3_(n)
INPUT
PINS
(H
ARDWARE
M
ODE
)
D
ATA
R
ATE
S
TATE
OF
E3_
(n)
P
IN
S
TATE
OF
STS-1/DS3_
(n)
P
IN
M
ODE
OF
B3ZS/HDB3 E
NCODER
/
D
ECODER
B
LOCKS
E3 (34.368 Mbps)
1
X (Don’t Care)
HDB3
DS3 (44.736 Mbps)
0
0
B3ZS
STS-1 (51.84 Mbps)
0
1
B3ZS
D4
D3
D2
D1
D0
X
STS-1/(DS3)_(n))
E3_(n)
LLB_(n) RLB_(n)
x
x
x
x
x
S
ELECTED
D
ATA
R
ATE
STS-1/DS3_
(n)
(D3)
E3_
(n)
(D2)
E3
X (Don’t Care)
1
DS3
0
0
STS-1
1
0
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| XRT73LC04A_08 | 制造商:EXAR 制造商全稱:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
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