參數(shù)資料
型號: MPC5200B
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: SDRAM/DDR Memory Controller
中文描述: 內存/ DDR存儲器控制器
文件頁數(shù): 34/78頁
文件大小: 629K
代理商: MPC5200B
MPC5200B Data Sheet, Rev. 1
Electrical and Thermal Characteristics
Freescale Semiconductor
34
Figure 15. Multiword DMA Timing
NOTE
The direction of signal assertion is towards the top of the page, and the
direction of negation is towards the bottom of the page, irrespective of the
electrical properties of the signal.
Table 29. Ultra DMA Timing Specification
Sym
MODE 0
(ns)
MODE 1
(ns)
MODE 2
(ns)
Comment
SpecID
Min
Max
Min
Max
Min
Max
t
CYC
114
75
55
Cycle time allowing for asymmetry and clock
variations from STROBE edge to STROBE edge
A8.26
t
2CYC
235
156
117
Two-cycle time allowing for clock variations, from
rising edge to next rising edge or from falling edge to
next falling edge of STROBE.
A8.27
t
DS
15
10
7
Data setup time at recipient.
A8.28
t
DH
5
5
5
Data hold time at recipient.
A8.29
t
DVS
70
48
34
Data valid setup time at sender, to STROBE edge.
A8.30
t
DVH
6
6
6
Data valid hold time at sender, from STROBE edge.
A8.31
t
FS
0
230
0
200
0
170
First STROBE time for drive to first negate DSTROBE
from STOP during a data-in burst.
A8.32
t
LI
0
150
0
150
0
150
Limited Interlock time.
A8.33
t
MLI
20
20
20
Interlock time with minimum.
A8.34
t
0
t
C
t
E
t
I
t
D
t
F
t
H
t
G
t
J
DMARQ
(Drive)
RDATA
(Drive)
WDATA
(Host)
(Host)
(Host)
t
L
t
K
DMACK
DIOR
DIOW
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