參數(shù)資料
型號(hào): PEF2015
廠商: SIEMENS A G
元件分類(lèi): 通信及網(wǎng)絡(luò)
英文描述: Mini IOM-2 Controller MICO
中文描述: SPECIALTY TELECOM CIRCUIT, PDSO28
文件頁(yè)數(shù): 10/84頁(yè)
文件大?。?/td> 1568K
代理商: PEF2015
PEF 2015
Overview
Semiconductor Group
10
12.97
9
10
11
12
13
14
16
17
AD0, D0
AD1, D1
AD2, D2
AD3, D3
AD4, D4
AD5, D5
AD6, D6
AD7, D7
I/O
Address/Data Bus; multiplexed bus mode.
Transfers addresses from the
μ
P to the MICO and data
between the
μ
P and the MICO.
Data Bus; demultiplexed bus mode.
Transfers data between the
μ
P and the MICO.
When driving data the pins have push pull
characteristic, otherwise they are in the state high
impedance.
Address Bus, demultiplexed mode.
Transfers addresses from the
μ
P to the MICO.
2
3
26
27
A0/ALE
A1
A2
A3
I
Address Latch Enable, multiplexed mode.
ALE controls the on chip address latch in multiplexed
bus mode. While ALE is ’high’ the latch is transparent.
The falling edge latches the current address.
Note: During reset A0 and A1 are evaluated to
determine the bus mode.
Read, active low, Siemens/Intel bus mode.
When ’low’ a read operation is indicated.
18
RD, DS
I
Data Strobe, Motorola bus mode.
A rising edge marks the end of a read or write
operation.
Write, active low, Siemens/Intel bus mode.
When ’low’ a write operation is indicated.
19
WR,
R/W
I
Read/Write, Motorola bus mode.
When ’high’ a valid
μ
P access identifies a read
operation, when ’low’ it identifies a write access.
Chip Select, active ’low’.
A low on this line selects the MICO for a read/write
operation.
20
CS
I
Pin
No.
Symbol
Input (I)
Output (O)
Function
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