參數(shù)資料
型號(hào): MCIMX27VOP4
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA404
封裝: 17 X 17 MM, 0.65 MM PITCH, LEAD FEE, MAPBGA-404
文件頁數(shù): 62/118頁
文件大小: 1159K
代理商: MCIMX27VOP4
i.MX27 Data Sheet, Advance Information, Rev. 0.1
48
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
Signal Descriptions
3.5.2
1-Wire Electrical Specifications
Figure 4 depicts the RPP timing, and Table 16 lists the RPP timing parameters.
Figure 4. Reset and Presence Pulses (RPP) Timing Diagram
Figure 5 depicts Write 0 Sequence timing, and Table 17 lists the timing parameters.
Figure 5. Write 0 Sequence Timing Diagram
Table 15. AC Electrical Characteristics of DDR I/O Pads
ID
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
PA1
Output Pad Transition Times (DDR Drive)
tpr
25 pF
50 pF
0.5
1.0
0.75
1.45
1.2
2.4
ns
Output Pad Transition Times (Max High)
tpr
25 pF
50 pF
0.67
1.3
1.0
2.0
1.6
3.1
ns
Output Pad Transition Times (High)
tpr
25 pF
35 pF
1.0
1.95
1.5
2.9
2.4
4.7
ns
Output Pad Transition Times (Normal)
tpr
25 pF
50 pF
2.0
3.9
2.9
5.9
4.8
8.4
ns
Maximum Input Transition Times
trm
5
ns
Table 16. RPP Sequence Delay Comparisons Timing Parameters
ID
Parameters
Symbol
Min
Typ
Max
Units
OW1
Reset Time Low
tRSTL
480
511
s
OW2
Presence Detect High
tPDH
15
60
s
OW3
Presence Detect Low
tPDL
60
240
s
OW4
Reset Time High
tRSTH
480
512
One-Wire bus
DS2502 Tx
“Presence Pulse”
(BATT_LINE)
1-Wire Tx
“Reset Pulse”
OW1
OW2
OW3
OW4
OW5
OW6
One-Wire bus
(BATT_LINE)
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