參數(shù)資料
型號: XRT86VL34_07
廠商: Exar Corporation
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù): 44/175頁
文件大?。?/td> 904K
代理商: XRT86VL34_07
XRT86VL34
39
QUAD T1/E1/J1 FRAMER/LIU COMBO - E1 REGISTER DESCRIPTION
REV. V1.2.0
1-0
SB_ENB[1:0]
R/W
01
Receive Slip Buffer Mode Select
These bits select modes of operation for the receive slip buffer. These two
bits also select the direction of RxSERCLK and RxSYNC in base clock
rate (2.048MHz). The following table shows the corresponding slip buffer
modes as well as the direction of the RxSYNC/RxSERCLK according to
the setting of these two bits.
N
OTE
:
If the user configures the Receive Slip Buffer to operate in the
“FIFO Mode”, then the user must make sure that the RxSerClk
input pin is synchronized to the Recovered Clock signal for this
particular channel.
T
ABLE
19: FIFO L
ATENCY
R
EGISTER
(FFOLR) H
EX
A
DDRESS
: 0
X
n117
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7-5
Reserved
-
-
Reserved
4-0
Rx Slip Buffer FIFO
Latency[4:0]
R/W
00100
Receive Slip Buffer FIFO Latency[4:0]:
These bits permit the user to specify the “Receive Data” Latency (in
terms of RxSerClk_n clock periods), whenever the Receive Slip
Buffer has been configured to operate in the “FIFO” Mode.
N
OTE
:
These bits are only active if the Receive Slip Buffer has been
configured to operate in the FIFO Mode.
T
ABLE
18: S
LIP
B
UFFER
C
ONTROL
R
EGISTER
(SBCR) H
EX
A
DDRESS
: 0
X
n116
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
SB_ENB
[1:0]
R
ECEIVE
S
LIP
B
UFFER
M
ODE
S
ELECT
D
IRECTION
OF
R
X
SERCLK
D
IRECTION
OF
R
X
SYNC
00/11
Receive Slip Buffer is
bypassed
Output
Output
01
Slip Buffer Mode
Input
Depends on the
setting of SB_SDIR
(bit 2 of this register)
If SB_SDIR = 0:
RxSYNC = Output
If SB_SDIR = 1:
RxSYNC = Input
10
FIFO Mode.
FIFO data latency
can be programmed
by the 'FIFO Latency
Register' (Address =
0xn117).
Input
Depends on the
setting of SB_SDIR
(bit 2 of this register)
If SB_SDIR = 0:
RxSYNC = Output
If SB_SDIR = 1:
RxSYNC = Input
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