參數(shù)資料
型號: MPC2105CDG66
廠商: MOTOROLA INC
元件分類: SRAM
英文描述: 512KB and 1MB BurstRAM Secondary Cache Modules for PowerPC PReP/CHRP Platforms
中文描述: 64K X 72 CACHE SRAM MODULE, 9 ns, PDMA178
文件頁數(shù): 12/18頁
文件大?。?/td> 229K
代理商: MPC2105CDG66
MPC2105C
MPC2106C
12
MOTOROLA FAST SRAM
TAG RAM AC OPERATING CONDITIONS AND CHARACTERISTICS
(VCC = 5.0 V
±
5%, TA = 0 to + 70
°
C, Unless Otherwise Noted)
Input Timing Measurement Reference Level
Input Pulse Levels
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Rise/Fall Time
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 V
. . . . . . . . . . . . . . .
0 to 3.0 V
3 ns
Output Timing Measurement Reference Level
Output Load
. . . . . . . . . . . . . . . . . .
1.5 V
. . . . . . . . . . . . .
Figure 1 Unless Otherwise Noted
TAG RAM READ CYCLE
(See Notes 1 through 4)
Tag RAM
Parameter
Symbol
Min
Max
Unit
Clock Access Time
tKHQV
tGLQV
tGLQX
tGHQZ
tAXSX
tAVSV
tAVQX
tAVQV
10
ns
Output Enable to Output Valid
8
ns
Output Enable to Output Active
0
ns
Output Disable to Q High–Z
1
6
ns
Status Bit Hold from Address Change
3
ns
Address Access Time Status Bits
10
ns
Tag Bit Hold from Address Change
3
ns
Address Access Time Tag Bits
12
ns
NOTES:
1. Setup and hold times, W (write) refers to TWE.
2. A read cycle is defined by TWE high. A write cycle is defined by TWE low.
3. Maximum access times are guaranteed for all possible MC68040 and PowerPC external bus cycles.
4. Tag reads are asynchronous.
TAG RAM WRITE CYCLE
(See Notes 1 through 4)
Tag RAM
Parameter
Symbol
Min
Max
Unit
Cycle Time
tKHKH
tKHKL
tKLKH
tKHQX
tAVKH
tWVKH
15
ns
Clock High Pulse Width
4.5
ns
Clock Low Pulse Width
4.5
ns
Clock High to Output Active
1.5
ns
Setup Times
Address
Write
3
ns
Hold Times
Address
Write
tKHAX
tKHWX
1.5
ns
Status Output Hold
tKHSX
tKHSV
0
ns
Clock High to Status Bits Valid
9
ns
NOTES:
1. Setup and hold times, W (write) refers to TWE.
2. A read cycle is defined by TWE high. A write cycle is defined by TWE low.
3. Maximum access times are guaranteed for all possible MC68040 and PowerPC external bus cycles.
4. Tag writes are synchronous.
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