參數(shù)資料
型號: MPC5554EVB
廠商: Freescale Semiconductor
文件頁數(shù): 27/58頁
文件大?。?/td> 0K
描述: BOARD EVALUATION MPC5554
標準包裝: 1
類型: 微控制器
適用于相關(guān)產(chǎn)品: MPC5554
所含物品: 評估板和演示軟件
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Electrical Characteristics
MPC5554 Microcontroller Data Sheet, Rev. 4
Freescale Semiconductor
33
3.13.4
External Bus Interface (EBI) Timing
Table 22 lists the timing information for the external bus interface (EBI).
Table 22. Bus Operation Timing1
Spec
Characteristic
and
Description
Symbol
External Bus Frequency 2, 3
Unit
Notes
40 MHz
56 MHz
66 MHz
Min.
Max.
Min.
Max.
Min.
Max.
1
CLKOUT period
TC
24.4
17.5
15.2
ns
Signals are measured
at 50% VDDE.
2
CLKOUT duty cycle
tCDC
45%
55%
45%
55%
45%
55%
TC
3
CLKOUT rise time
tCRT
——4
——4
ns
4
CLKOUT fall time
tCFT
——4
ns
5
CLKOUT positive edge to output
signal invalid or Hi-Z (hold time)
External bus interface
BG 5
BR 6
BB
CS[0:3]
ADDR[8:31]
DATA[0:31] 7
BDIP
OE
RD_WR
TA
TEA 8
TS
TSIZ[0:1]
WE/BE[0:3] 9
tCOH
1.010
1.5
1.010
1.5
1.5
—ns
EBTS = 0
EBTS = 1
Hold time selectable
via SIU_ECCR
[EBTS] bit.
6
CLKOUT positive edge to output
signal valid (output delay)
External bus interface
BG 5
BR 6
BB
CS[0:3]
ADDR[8:31]
DATA[0:31] 7
BDIP
OE
RD_WR
TA
TEA 8
TS
TSIZ[0:1]
WE/BE[0:3] 9
tCOV
10.010
11.0
7.510
8.5
7.0
ns
EBTS = 0
EBTS = 1
Output valid time
selectable via
SIU_ECCR
[EBTS] bit.
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