參數(shù)資料
型號(hào): PSB7110
廠商: SIEMENS AG
英文描述: Enhanced ISDN Data Access Controller ISAR
中文描述: 增強(qiáng)綜合業(yè)務(wù)數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組
文件頁數(shù): 14/164頁
文件大?。?/td> 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 14
1.5
Pin Description
Parallel Host Interface
Pin No.
Symbol
In (I)
Out (O)
Function
16
15
14
13
9
8
7
6
4
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
RD#
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
Address/Data Bus
Transfers addresses and data between the host and the ISAR PSB 7110.
Read
This signal indicates a read operation.
Write
This signal indicates a write operation.
Chip Select
Address Latch Enable
A "high" on this line indicates an address on AD(0:7), that will be latched by
the ISAR. This allows the ISAR to be directly connected to a host with
multiplexed address/data bus.
Interrupt Request
This signal is activated, when the ISAR requests an interrupt. This pin is an
open drain output only.
5
WR#
I
3
2
CS#
ALE
I
I
18
INT#
O (OD)
IOM-2 Interface
Pin No.
Symbol
In (I)
Out (O)
Function
23
DD
I/O
Data Downstream
on IOM-2/PCM interface.
Data Upstream
on IOM-2/PCM interface.
Data Clock
Clock frequency is twice the data rate, or equal to the data rate.
Frame Sync
Marks the beginning of a physical IOM-2 or PCM frame.
22
DU
I/O
21
DCL
I
20
FSC
I
System Clocks
Pin No.
Symbol
In (I)
Out (O)
Function
90
XTAL1
I
Crystal In or Clock In
If a crystal is used, it is connected between XTAL1 and XTAL2. If a clock
signal is provided (via an external oscillator), this signal is input via XTAL1. In
this case the XTAL2 output is to be left non-connected.
Crystal Out
Left unconnected if a crystal is not used.
not used, connect to VSSA or VDDA.
not used, connect to VSSA, VDDA or leave open.
91
XTAL2
O
83
82
VREF
RADJ
I
I
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