參數(shù)資料
型號: PEB2445-N
廠商: SIEMENS A G
元件分類: 路由/交換
英文描述: Multipoint Switching and Conferencing Unit - Attenuation MUSAC-A
中文描述: TELECOM, CONFERENCING CIRCUIT, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 36/70頁
文件大?。?/td> 1236K
代理商: PEB2445-N
PEB 2445
Functional Description
Semiconductor Group
36
02.96
Five directly addressable registers are provided:
Mode register (MOD)
Status register (STA)
Conference Status register (CST)
Conference Mask Register (CMR)
Indirect Access Register (IAR)
Two other registers and the control memories are accessed by a simple three byte
indirect access method:
Configuration Register (CFR)
Clock Shift Register (CSR)
Connection Memory (CM)
Conference Control Memory (CCM)
The status register (STA) and the conference status register (CST) are read-only-
registers, the conference mask register (CMR) is a write-only-register; MOD, CFR, CSR,
IAR and CM or CCM can be read or written. An indirect access scheme is used to access
the CFR, CSR, CM or CCM using the indirect access register (IAR).
The following direct registers may be accessed:
Table 5
Addressing the Direct Registers
If A1 is not connected in the demultiplexed mode neither an access to the CMR, CST
nor a read access to the MOD register is possible.
In this case A1 is fixed to ground internally.
Address
Write Operation
Read Operation
Demultiplexed Mode
A(1:0)
0
H
1
H
2
H
3
H
Multiplexed Mode
AD(7:0)
0
H
2
H
4
H
6
H
MOD
IAR
CMR
STA
IAR
CST
MOD
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