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参数资料
| 型号： | MA31751 |
| 厂商： | Dynex Semiconductor Ltd. |
| 英文描述： | Memory Management & Block Protection Unit |
| 中文描述： | 内存管理 |
| 文件页数： | 4/17页 |
| 文件大小： | 160K |
| 代理商： | MA31751 |
MA31751
4/17
AS[0:3]
A[0:15]
EA[3:10]
A[4:15]
PB[0:3]
AS[0:3]
A[0:15]
EA[0:10]
A[4:15]
1750A
Addressing
Logical
Physical
1750B
Addressing
Logical*
Physical
1750A Extended Physical Address [0:19]
1750B Extended Physical Address [0:22]
EA3
A4
A15
AS0
AS3 A0
PA0
PA19
EA10
A15
PA0
PA22
A15
A4
EA10
EA0
PB0
PB3
AS3
AS0
A15
A0
* There are 16M words of logical address in 1750B. The 16MWord
logical to 8MWord physical mapping is user defined.
Figure 4: Extended Address Mapping in 1750A/B Mode
Figure 5: MA31751 Selection Chart for Varying Memory Requirements
Addressable
Physical
Memory
64KW
1MW
64KW
1MW
64KW
8MW
8MW
8MW
8MW
8MW
64KW
8MW
8MW
8MW
8MW
8MW
Notes: 1. Memory is specified in terms of addressable instruction space.
2. It is assumed that the whole of the physical address space is used in 1750B - if this is not the
case the number of MA31751 chips may be reduced.
Addressable
Logical
Memory
64KW
1MW
64KW
1MW
64KW
1MW
2MW
4MW
8MW
16MW
64KW
1MW
2MW
4MW
8MW
16MW
Is BPU
Protection
Required
NO
NO
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Mode
Number of
MMUs
Number of
BPUs
Number of
MA31751s
Required
0
1
1
1
0
1
2
4
8
16
1
8
8
8
8
16
A
A
A
A
B
B
B
B
B
B
B
B
B
B
B
B
0
1
0
1
0
1
2
4
8
16
0
1
2
4
8
16
0
0
1
1
0
0
0
0
0
0
1
8
8
8
8
8
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参数描述 |
|---|---|
| MA31753 | 制造商:DYNEX 制造商全称:Dynex Semiconductor 功能描述:DMA Controller (DMAC) For An MA31750 System |
| MA31755 | 制造商:DYNEX 制造商全称:Dynex Semiconductor 功能描述:16-Bit Feedthrough Error Detection & Correction Unit EDAC |
| MA318 | 功能描述:CPU与芯片冷却器 INTEL P111 FC-PGA RoHS:否 制造商:ADLINK Technology 尺寸: 电压额定值: 功率额定值: 速度: 气流: 系列: |
| MA3180 | 制造商:PANASONIC 制造商全称:Panasonic Semiconductor 功能描述:Silicon planar type |
| MA3180-H | 制造商:PANASONIC 制造商全称:Panasonic Semiconductor 功能描述:Silicon planar type |
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