參數(shù)資料
型號(hào)： MD82C55B
廠商： Harris Corporation
英文描述： CMOS Programmable Peripheral Interface
中文描述： CMOS可編程外設(shè)接口
文件頁(yè)數(shù)： 13/26頁(yè)
文件大?。?/td> 234K
代理商： MD82C55B
13
Special Mode Combination Considerations
There are several combinations of modes possible. For any
combination, some or all of Port C lines are used for control
or status. The remaining bits are either inputs or outputs as
defined by a “Set Mode” command.
During a read of Port C, the state of all the Port C lines,
except the ACK and STB lines, will be placed on the data
bus. In place of the ACK and STB line states, flag status will
appear on the data bus in the PC2, PC4, and PC6 bit
positions as illustrated by Figure 17.
Through a “Write Port C” command, only the Port C pins
programmed as outputs in a Mode 0 group can be written.
No other pins can be affected by a “Write Port C” command,
nor can the interrupt enable flags be accessed. To write to
any Port C output programmed as an output in Mode 1 group
or to change an interrupt enable flag, the “Set/Reset Port C
Bit” command must be used.
With a “Set/Reset Port Cea Bit” command, any Port C line
programmed as an output (including IBF and OBF) can be
written, or an interrupt enable flag can be either set or reset.
Port C lines programmed as inputs, including ACK and STB
lines, associated with Port C fare not affected by a
“Set/Reset Port C Bit” command. Writing to the correspond-
ing Port C bit positions of the ACK and STB lines with the
“Set Reset Port C Bit” command will affect the Group A and
Group B interrupt enable flags, as illustrated in Figure 17.
Current Drive Capability
Any output on Port A, B or C can sink or source 2.5mA. This
feature allows the 82C55A to directly drive Darlington type
drivers and high-voltage displays that require such sink or
source current.
MODE DEFINITION SUMMARY
MODE 0
MODE 1
MODE 2
IN
OUT
IN
OUT
GROUP A ONLY
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
INTRB
IBFB
STBB
INTRA
STBA
IBFA
I/O
I/O
INTRB
OBFB
ACKB
INTRA
I/O
I/O
ACKA
OBFA
I/O
I/O
I/O
INTRA
STBA
IBFA
ACKA
OBFA
Mode 0
or Mode 1
Only
INPUT CONFIGURATION
D7
D6
D5
D4
D3
D2
D1
D0
I/O
I/O
IBFA
INTEA INTRA INTEB
IBFB
INTRB
OUTPUT CONFIGURATION
D7
D6
D5
D4
D3
D2
D1
D0
OBFA
INTEA
I/O
I/O
INTRA INTEB
OBFB INTRB
FIGURE 15. MODE 1 STATUS WORD FORMAT
D7
D6
D5
D4
D3
D2
D1
D0
OBFA
INTE1
IBFA
INTE2 INTRA
X
X
X
(Defined by Mode 0 or Mode 1 Selection)
FIGURE 16. MODE 2 STATUS WORD FORMAT
GROUP A
GROUP B
GROUP A
GROUP B
GROUP A
GROUP B
82C55A
相關(guān)PDF資料
PDF描述
MD900 Ultra High Sensitivity Gateable Channel Photomultiplier DC-Modules
MDFB51 Fast Recovery Diode
MDFB5120 Fast Recovery Diode
MDFB5122 Fast Recovery Diode
MDFB5124 Fast Recovery Diode
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MD82C59A 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Priority Interrupt Controller
MD82C59A WAF 制造商:Harris Corporation 功能描述:
MD82C59A/7 制造商:Intersil Corporation 功能描述:PRIORITY INTERRUPT CONTROLLER, THIN EPI - Rail/Tube
MD82C59A/B 制造商:Intersil Corporation 功能描述:INTERRUPT CNTRLR 5V 28CDIP - Rail/Tube 制造商:Intersil Corporation 功能描述:PERIPH INT CNTRLR 5V 8MHZ 28CDIP MIL
MD82C59A-12 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Priority Interrupt Controller
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*