參數(shù)資料
型號(hào): A8255
廠商: Altera Corporation
英文描述: PROGRAMMABLE PERIPHERAL INTERFACE ADAPTER
中文描述: 可編程外圍接口適配器
文件頁(yè)數(shù): 3/13頁(yè)
文件大小: 250K
代理商: A8255
Altera Corporation
47
a8255 Programmable Peripheral Interface Adapter Data Sheet
Functional
Description
Figure 2
shows a block diagram of the
a8255
.
Figure 2. a8255 Block Diagram
Data Output Select
Control Register Data
Port A
Output Register
Control Register
& Logic
reset
ncs
nrd
nwr
a[1..0]
din[7..0]
Data Output
Multiplexer
paen
pben
pcen[7..0]
dout[7..0]
Port A
Input Register
Port C
Output Register
& Control
Port B
Input Register
Port B
Output Register
Port Control Bus
paout[7..0]
pain[7..0]
pbout[7..0]
pbin[7..0]
pcout[7..0]
pcin[7..0]
Port C Status
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