參數(shù)資料
型號: XRT83L314IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PBGA304
封裝: TBGA-304
文件頁數(shù): 40/84頁
文件大?。?/td> 631K
代理商: XRT83L314IB
XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
36
4.2
The XRT83L314 has the capability of providing the necessary chip selects for multiple 14-channel LIU devices.
The LIU is responsible for selecting itself, up to 5 additional LIU devices, or all 6 devices simultaneously for
permitting access to internal registers. The state of the chip select output pins is determined by a chip select
decoder controlled by the 3 MSBs of the address bus ADDR[10:8]. Only one LIU (Master) requires the
ADDR[10:8]. The other 5 LIU devices use the 8 LSBs for the direct address bus ADDR[7:0]. Figure 35 is a
simplified block diagram of connecting six 14-channel LIU devices for 84-channel applications. Selection of
the chip select outputs using ADDR[10:8] is shown in Table 13.
F
IGURE
35. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
AN
84-C
HANNEL
A
PPLICATION
84-Channel T1/E1 Multiplexer/Mapper Applications
T
ABLE
13: C
HIP
S
ELECT
A
SSIGNMENTS
ADDR[10:8]
A
CTIVE
C
HIP
S
ELECT
0h (000)
Current Device (Master)
1h (001)
Chip 1
2h (010)
Chip 2
3h (011)
Chip 3
4h (100)
Chip 4
5h (101)
Chip 5
6h (110)
Reserved
7h (111)
All Devices Active
Chip Address A[10:8]
Address A[7:0]
XRT83L314
Data [7:0]
CS[4:0]
CS
CS
CS
CS
CS
1
XRT83L314
XRT83L314
XRT83L314
XRT83L314
XRT83L314
2
3
4
5
6
Master
Slave
Slave
Slave
Slave
Slave
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