參數(shù)資料
型號(hào)： T7121-EL2
英文描述： T7121 HDLC Interface for ISDN
中文描述： T7121的HDLC接口用于ISDN
文件頁數(shù)： 17/68頁
文件大小： 685K
代理商： T7121-EL2
Lucent Technologies Inc.
17
Data Sheet
April 1997
T7121 HDLC Interface for ISDN (HIFI-64)
Functional Description
(continued)
5-5034
Note: abcdefgh are not the same as ABCDEFGH due to HDLC processing.
Figure 8. 16 kbits/s Operation
a b c d e f g h
TRANSMIT FIFO
HDLC
3 3 3 3 3 3 * G H
TRANSMITTER HDLC
PROCESSES LSB FIRST
FIRST BIT
TRANSMITTED
TIME-SLOT DATA
MSB
BIT 7
LSB
BIT 0
DIRECTION OF TRANSMISSION
TLBIT = 1
(TRANSMIT LSB FIRST)
a b c d e f g h
RECEIVE FIFO
HDLC
RECEIVER HDLC
EXPECTS LSB FIRST
MSB
BIT 7
LSB
BIT 0
DIRECTION OF RECEPTION
TBM7
0 0 0 0 0 0 1 1
TBM0
G
H
E
F
C
D
A
B
(R13) TRANSMITTER BIT MASK
3 3 3 3 3 3 E F
3 3 3 3 3 3 C D
3 3 3 3 3 3 A B
*3 = 3-STATE.
1ST TIME SLOT
2ND TIME SLOT
3RD TIME SLOT
4TH TIME SLOT
H G X X X X X X*
FIRST BIT RECEIVED
TIME-SLOT DATA
0 0 0 0 0 0 1 1
RBM7
RBM0
H
G
F
E
D
C
B
A
(R12) RECEIVER BIT MASK
F E X X X X X X
D C X X X X X X
B A X X X X X X
*X = DON'T CARE. THESE BITS
ARE IGNORED BY THE RECEIVER.
1ST TIME SLOT
2ND TIME SLOT
3RD TIME SLOT
4TH TIME SLOT
RLBIT = 1
(RECEIVE LSB FIRST)
a b c d e f g h
TRANSMIT FIFO
HDLC
H G 3 3 3 3 3 3*
TRANSMITTER HDLC
PROCESSES LSB FIRST
FIRST BIT
TRANSMITTED
TIME-SLOT DATA
MSB
BIT 7
LSB
BIT 0
DIRECTION OF TRANSMISSION
TLBIT = 0
(TRANSMIT MSB FIRST)
a b c d e f g h
RECEIVE FIFO
HDLC
RECEIVER HDLC
EXPECTS LSB FIRST
MSB
BIT 7
LSB
BIT 0
DIRECTION OF RECEPTION
TBM7
0 0 0 0 0 0 1 1
TBM0
G
H
E
F
C
D
A
B
(R13) TRANSMITTER BIT MASK
F E 3 3 3 3 3 3
D C 3 3 3 3 3 3
B A 3 3 3 3 3 3
*3 = 3-STATE.
1ST TIME SLOT
2ND TIME SLOT
3RD TIME SLOT
4TH TIME SLOT
X*X X X X X G H
FIRST BIT RECEIVED
TIME-SLOT DATA
RBM7
0 0 0 0 0 0 1 1
RBM0
H
G
F
E
D
C
B
A
(R12) RECEIVER BIT MASK
X X X X X X E F
X X X X X X C D
X X X X X X A B
1ST TIME SLOT
2ND TIME SLOT
3RD TIME SLOT
4TH TIME SLOT
RLBIT = 0
(RECEIVE MSB FIRST)
*X = DON'T CARE. THESE BITS
ARE IGNORED BY THE RECEIVER.
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T7-121F1 功能描述:撥動(dòng)開關(guān) ON OFF ON 1 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
T7-121F5 功能描述:撥動(dòng)開關(guān) ON OFF ON 1 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
T7-121G1 功能描述:撥動(dòng)開關(guān) (ON) OFF ON 1 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
T7-121G5 功能描述:撥動(dòng)開關(guān) (ON) OFF ON 1 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
T7-121H1 制造商:OTTO 功能描述:Toggle Switches OFF NONE ON 1 Pole Standard Bat Handle 制造商:OTTO Engineering Inc 功能描述:TOGGLE SWITCH 1 POLE
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