參數(shù)資料
型號: PEB2245N
廠商: SIEMENS AG
英文描述: ?Multipoint Switching and Conferencing Unit - Attenuation?
中文描述: ?多點交換和會議股-衰減?
文件頁數(shù): 30/70頁
文件大小: 1021K
代理商: PEB2245N
PEB 2245
Semiconductor Group
30
Table 4
μ
P-Interface Functions
In the multiplexed
μ
P-interface mode A0, A1 have to be fixed to logical 0. For a demultiplexed
μ
P interface the address bits A1 and A0 are needed for addressing a register. For the
μ
P-interface
timing pleasure refer to
chapter 5.5
.
Five directly addressable registers are provided:
G
Mode register (MOD)
G
Status register (STA)
G
Conference Status register (CST)
G
Conference Mask Register (CMR)
G
Indirect Access Register (IAR)
Two other registers and the control memories are accessed by a simple three byte indirect access
method:
G
Configuration Register (CFR)
G
Clock Shift Register (CSR)
G
Connection Memory (CM)
G
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
ALE
Type of
μ
P-Interface
Motorola
Intel
Intel
Bus Structure
Pin 24
Pin 25
Package
Fixed to
V
DD
Fixed to ground
Switching
demultiplexed
demultiplexed
multiplexed
DS
RD
RD
R/W
WR
WR
P-LCC
P-LCC
P-LCC
Address
Write Operation
Read Operation
Demultiplexed
Mode A (1:0)
Multiplexed
Mode AD (7:0)
0
H
1
H
2
H
3
H
0
H
2
H
4
H
6
H
MOD
MOD
STA
CMR
CST
IAR
IAR
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