MCIMX255AJM4A Freescale, MCIMX255AJM4A Datasheet - Page 41

• Manufacturer Part Number: MCIMX255AJM4A
• Manufacturer: Freescale

Specifications of MCIMX255AJM4A

• Lead Free Status / RoHS Status: Compliant

2
3
4
3.7
This section contains the timing and electrical parameters for i.MX25 modules.
3.7.1
Figure 7
parameters.
Figure 8
are shown in the figure.
Freescale Semiconductor
Vid(ac) specifies the input differential voltage |Vtr–Vcp| required for switching, where Vtr is the “true” input signal and Vcp is
the “complementary” input signal. The minimum value is equal to Vih(ac)–Vil(ac)
The typical value of Vix(ac) is expected to be about 0.5
indicates the voltage at which differential input signal must cross.
The typical value of Vox(ac) is expected to be about 0.5
indicates the voltage at which differential output signal must cross. Cload = 25 pF.
OW1
OW2
OW3
OW4
ID
1-Wire bus
(OWIRE_LINE)
shows the reset and presence pulses (RPP) timing for 1-Wire, and
shows write 0 sequence timing, and
Module Timing and Electrical Parameters
1-Wire Timing Parameters
1-Wire bus
(OWIRE_LINE)
Table 30. RPP Sequence Delay Comparisons Timing Parameters
Presence Detect High
Presence Detect Low
Reset Time High
Reset Time Low
i.MX25 Applications Processor for Automotive Products, Rev. 4
Parameters
“Reset Pulse”
1-Wire Tx
Figure 8. Write 0 Sequence Timing Diagram
OW1
Figure 7. 1-Wire RPP Timing Diagram
Table 31
OVDD. and Vix(ac) is expected to track variation of OVDD. Vix(ac)
OVDD and Vox(ac) is expected to track variation in OVDD. Vox(ac)
OW5
Symbol
describes the timing parameters (OW5–OW6) that
t
t
t
t
RSTH
RSTL
PDH
PDL
OW6
OW3
1-Wire Memory Device
OW2
“Presence Pulse”
Min.
480
480
15
60
Table 30
OW4
Typ.
511
512
—
—
lists the RPP timing
Max.
240
60
—
—
Units
us
us
us
us
41