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參數(shù)資料
| 型號： | M66221SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | 256 x 9-BIT MAIL-BOX |
| 中文描述： | 256 × 9位企業(yè)郵箱 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 119K |
| 代理商： | M66221SP |
MITSUBISHI
DIGITAL ASSP
M66221SP/FP
256
×
9-BIT MAIL-BOX
4
Arbitration Function and Port Access
Contention No. 1 (Address control)
Table 3 gives the port access states and the Not Ready signal output
states if the same address is selected in shared memory by an address
Table 3 Contention Processing by Address Input
Address setting when selecting
same address
First-in A port
First-in B port
First-in A port
First-in B port
First-in A port
First-in B port
First-in A port
First-in B port
Simultaneous A and B ports
A port
Access
,
,
,
,
,
×
,
×
Mode setting
Read
Read
Read
Read
Write
Write
Write
Write
Not Ready A
H
L
H
L
H
L
H
L
Arbitration Resolved
B port
Access
,
,
×
,
,
,
×
,
Mode setting
Read
Read
Write
Write
Read
Read
Write
Write
Not Ready B
L
H
L
H
L
H
L
H
Arbitration Resolved
Contention No. 2 (CS control)
Table 4 gives the port access states and the Not Ready signal output
states when setting the CS inputs from A and B ports valid, and
input set from A and B ports with CSA = CSB = “L”.
selecting the same address in shared memory with A
0
A to A
7
A=A
0
B
to A
7
B.
CSA = CSB = “L”
Table 4 Contention Processing by CS Input
CS input set when selecting
same address
First-in A port
First-in B port
First-in A port
First-in B port
First-in A port
First-in B port
First-in A port
First-in B port
Simultaneous A and B ports
A port
Access
,
,
,
,
,
×
,
×
Mode setting
Read
Read
Read
Read
Write
Write
Write
Write
Not Ready A
H
L
H
L
H
L
H
L
Arbitration Resolved
B port
Access
,
,
×
,
,
,
×
,
Mode setting
Read
Read
Write
Write
Read
Read
Write
Write
Not Ready B
L
H
L
H
L
H
L
H
Arbitration Resolved
A
0
A ~ A
7
A = A
0
B ~ A
7
B
Note 2: “H” = High level, “L” = Low level
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M66222FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:128 x 8-BIT x 2 MAIL-BOX |
| M66222SP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:128*8-BIT*2 MAIL-BOX |
| M66223FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Mail Box That Incorporates a Complete CMOS Shared Memory Cell |
| M66230FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:A2RT(ADVANCED ASYNCHRONOUS RECEIVER & TRANSMITTER) |
| M66230P | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:A2RT(ADVANCED ASYNCHRONOUS RECEIVER & TRANSMITTER) |
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