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參數(shù)資料
| 型號： | TTSI1K16T3TL |
| 英文描述： | 1024-Channel, 16-Highway Time-Slot Interchanger |
| 中文描述： | 1024通道，16道時隙交換器 |
| 文件頁數(shù)： | 49/64頁 |
| 文件大?。?/td> | 1110K |
| 代理商： | TTSI1K16T3TL |
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Preliminary Data Sheet
February 1999
TTSI1K16T
1024-Channel, 16-Highway Time-Slot Interchanger
49
Lucent Technologies Inc.
Configuration Register Architecture
(continued)
Transmit Highway 3-State Options
There are several ways of 3-stating the transmit highways:
TEST (active-low) is the input pin that 3-states all outputs and bidirectional pins of the device.
GXE (bit 0) (active-high) is the global transmit enable bit in the general command register. It applies to all transmit
highways.
XE (bit 2) (active-high) is the transmit highway 3-state enable bit in the transmit highway configuration register
(byte 2). There is a separate XE bit for each one of the 16 transmit highways.
ED (bit 6) (active-high) is the external drivers bit in the general command register. This bit applies to all the transmit
highways. It affects the 3-stating of the transmit highways. Time slots that are selected to be 3-stated, by setting
the TSDSM[2—0] bits to 0x7 in byte 2 of the connection store, will be driven with random data if ED = 1. Otherwise,
these time slots will be 3-stated.
Table 41. Transmit Highway 3-State Options
TEST
(Input
Pin)
GXE
(Cfg
Bit)
ED
(Cfg
Bit)
XE for
Transmit
Highway [i]
(Cfg Bit)
X
X
X
0
1
TXD[0—15] Pins
TXOE[0—15] Pins
0
1
1
1
1
X
0
0
1
1
X
0
1
0
0
All high impedance.
All high impedance.
All high impedance.
All 0.
All driven with random data.
All 0.
TXD[i] = high impedance.
TXOE[i] = 0.
TXD[i] = 0, 1, or high impedance
according to connection store pro-
gramming.
TXD[i] is driven with random data.
TXOE[i] = 0 or 1, representing high-imped-
ance state according to connection store
programming.
TXOE[i] = 0.
1
1
1
1
1
1
0
1
TXD[i] = 0 or 1 reflecting the correct
transmit data. Time slots which are
selected for high-impedance mode
via the connection store will be
driven with random data and not
3-stated.
TXOE[i] = 0 or 1, representing high-imped-
ance state according to connection store
programming.
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