mcimx27- Freescale Semiconductor, Inc, mcimx27- Datasheet - Page 47

• Manufacturer Part Number: mcimx27-
• Description: Multimedia Applications Processor
• Manufacturer: Freescale Semiconductor, Inc

3.5.2
Figure 4
Figure 5
Freescale Semiconductor
PA1
ID
One-Wire bus
(BATT_LINE)
OW1
OW2
OW3
OW4
ID
Output Pad Transition Times (DDR Drive)
Output Pad Transition Times (Max High)
Output Pad Transition Times (High)
Output Pad Transition Times (Normal)
Maximum Input Transition Times
depicts the RPP timing, and
depicts Write 0 Sequence timing, and
1-Wire Electrical Specifications
One-Wire bus
(BATT_LINE)
Reset Time Low
Presence Detect High
Presence Detect Low
Reset Time High
Table 17. RPP Sequence Delay Comparisons Timing Parameters
Figure 4. Reset and Presence Pulses (RPP) Timing Diagram
Parameter
Table 16. AC Electrical Characteristics of DDR I/O Pads
Parameters
“Reset Pulse”
1-Wire Tx
Figure 5. Write 0 Sequence Timing Diagram
OW1
Preliminary—Subject to Change Without Notice
i.MX27 and i.MX27L Data Sheet, Rev. 1.2
Table 17
lists the RPP timing parameters.
Table 18
OW5
Symbol
trm
tpr
tpr
tpr
tpr
t
t
t
t
RSTL
PDH
PDL
RSTH
Symbol
lists the timing parameters.
OW6
Test Condition
OW3
OW2
25 pF
50 pF
25 pF
50 pF
25 pF
35 pF
25 pF
50 pF
“Presence Pulse”
—
Min
480
480
DS2502 Tx
15
60
Typical
0.67
1.95
Min
0.5
1.0
1.3
1.0
2.0
3.9
511
512
—
OW4
—
—
Typical
0.75
1.45
1.0
2.0
1.5
2.9
2.9
5.9
—
Max
240
60
—
Signal Descriptions
Max
1.2
2.4
1.6
3.1
2.4
4.7
4.8
8.4
5
Units
µs
µs
µs
—
Units
ns
ns
ns
ns
ns
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