参数资料
型号: CORE8051-AR
厂商: Microsemi SoC
文件页数: 23/41页
文件大小: 0K
描述: IP MODULE CORE8051
标准包装: 1
系列: *
Core8051
Figure 9 shows an external data memory read cycle with one stretch cycle.
0ns
50ns
100ns
150ns
200ns
250ns
300ns
350ns
clk
memaddr
N
N+1
Addr
N+1
memrd
memwr
mempsrd
mempswr
sample
sample
sample
sample
sample
sample
mempsack
memdatao
read sample
read sample
read sample
memdatai
(N)
Data
(N+1)
Figure 9 ? External Data Memory Read Cycle with One Stretch Cycle
Figure 10 shows an external data memory read cycle with two stretch cycles.
0ns
50ns
100ns
150ns
200ns
250ns
300ns
clk
memaddr
N
N+1
Addr
N+1
memrd
memwr
mempsrd
memdatao
max. 3*Tclk
memdatai
(N)
read sample
Data
(N+1)
read
sample
read
sample
Figure 10 ? External Data Memory Read Cycle with Two Stretch Cycles
Figure 11 shows an external data memory read cycle with seven stretch cycles.
0ns
50ns
100ns
150ns
200ns
250ns
300ns
350ns
400ns
450ns
500ns
clk
memaddr
N
N+1
Addr
N+1
memrd
memwr
mempsrd
memdatao
max. 8*Tclk
memdatai
(N)
read sample
Data
read
(N+1)
read
sample sample
Figure 11 ? External Data Memory Read Cycle with Seven Stretch Cycles
v6.0
23
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