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參數(shù)資料
| 型號(hào)： | MSM81C55-5RS |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER |
| 中文描述： | 2048位CMOS靜態(tài)RAM與I / O端口和定時(shí)器 |
| 文件頁(yè)數(shù)： | 11/19頁(yè) |
| 文件大?。?/td> | 156K |
| 代理商： | MSM81C55-5RS |
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11/19
Semiconductor
MSM81C55-5RS/GS/JS
(1) Programming the Command/Status (C/S) Register
The contents of the command register can be written during an I/O cycle by addressing it
with an I/O address of xxxxx000. Bit assignments for the register are shown below:
TM2
TM1
IEB
IEA
PC2
PC1
PB
PA
Definition of PA
0 - 7
Definition of PB
0 - 7
0= Input
1= Output
Definition of PC
0 - 5
00=ALT1
11=ALT2
01=ALT3
10=ALT4
See the port
control
assignment
table.
Port A Interrupt Enable
Port B Interrupt Enable
1 = Enabled
0 = Disabled
Timer Command
00 = NOP : Does not affect counter operations.
01 = STOP : Stops the timer if it is runnning.
NOP if the timer is not runnning.
10 = STOP AFTER TC : Stops the timer when it reaches TC.
NOP if the timer is not running.
11 = START :If the timer is not running, loads the mode and
the count length, and immediately starts timer operation.
If the timer is running, loads a new mode and the count
length, and starts timer operation immediately after
TC is reached.
7
6
5
4
3
2
1
0
Pin
PC
0
PC
1
PC
2
PC
3
PC
4
PC
5
ALT1
Input port
Input port
Input port
Input port
Input port
Input port
ALT2
Output port
Output port
Output port
Output port
Output port
Output port
ALT3
A INTR
A BF
A STB
Output port
Output port
Output port
ALT4
A INTR
A BF
A STB
B INTR
B BF
B STB
Port Control Assignment Table
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相關(guān)代理商/技術(shù)參數(shù) |
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| MSM82C37B-5GS | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:PROGRAMMABLE DMA CONTROLLER |
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| MSM82C37B-5VJS | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:PROGRAMMABLE DMA CONTROLLER |
| MSM82C43 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:INPUT/OUTPUT PORT EXPANDER |
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