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參數(shù)資料
| 型號： | a8259 |
| 廠商： | Altera Corporation |
| 英文描述： | Programmable Interrupt Controller(可編程中斷控制器) |
| 中文描述： | 可編程中斷控制器（可編程中斷控制器） |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 220K |
| 代理商： | A8259 |
Altera Corporation
57
a8259
Programmable
Interrupt Controller
July 1997, ver. 1
Data Sheet
A-DS-A8259-01
Features
I
I
I
I
I
I
I
Optimized for FLEX
Offers eight levels of individually maskable interrupts
Expandable to 64 interrupts
Offers a flexible priority resolution scheme
Provides programmable interrupt modes and vectors
Uses approximately 399 logic elements (LEs) in FLEX devices
Functionally based on the Intel 8259 device, except as noted in the
“Variations & Clarifications” section on page 79
and MAX
architectures
General
Description
The Altera
controller. The
eight data bus lines (
int
, and
ninta
a8259
a8259
MegaCore
can be initialized by the microprocessor through
din[7..0]
and
dout[7..0]
control signals.
Figure 1
shows the symbol for the
function is a programmable interrupt
), and the
ncs
,
nrd
,
nwr
,
.
a8259
Figure 1. a8259 Symbol
A8259
nEN
DOUT[7..0]
CASOUT[2..0]
CAS_EN
INT
nMRST
CLK
nCS
nWR
nRD
A0
nINTA
CASIN[2..0]
IR[7..0]
DIN[7..0]
nSP
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