參數(shù)資料
型號: EC000UM
英文描述: EC000 Core User's Manual (SCM68000)
中文描述: EC000核心用戶手冊(SCM68000)
文件頁數(shù): 39/145頁
文件大?。?/td> 829K
代理商: EC000UM
Electrical Characteristics
7-4
EC000 CORE PROCESSOR USER’S MANUAL
MOTOROLA
Figure 7-2. Read Cycle Timing Diagram
6A
8
6
13
14
12
17
18
47
28
29
27
48
47
30
47
32
56
47
32
S0
S1
S2
S3
S4
S5
S6
CLKI
FC2–FC0
A31–A0
ASB
DSB/LDSB/UDSB
RWB
DTACKB
DATA IN
BERRB/BRB
(NOTE 2)
HALTIB/RESETIB
47
ASYNCHRONOUS
INPUTS
(NOTE 1)
S7
31
11
11A
NOTES:
1. Setup time for the asynchronous inputs IPLB2–IPLB0 (spec #47) guarantees their recognition at the
next falling edge of the clock.
2. BRB need fall at this time only to ensure being recognized at the end of the bus cycle.
3. Timing measurements are referenced to and from a low voltage of 0.2 VDD and a high voltage of 0.8 VDD,
unless otherwise noted. The voltage swing through this range should start outside and pass through the
range such that the rise or fall is linear between 0.2 VDD and 0.8 VDD.
9
28A
15
29A
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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