MCIMX25 Motorola Semiconductor Products, MCIMX25 Datasheet - Page 40

• Manufacturer Part Number: MCIMX25
• Manufacturer: Motorola Semiconductor Products

2
3
4
3.6
This section contains the timing and electrical parameters for i.MX25 modules.
3.6.1
Figure 7
parameters.
Figure 8
are shown in the figure.
40
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 OVDD and Vox(ac) is expected to track variation in OVDD. Vox(ac)
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
(OWIRE_LINE)
1-Wire bus
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 2
Table 28. RPP Sequence Delay Comparisons Timing Parameters
Presence Detect High
Presence Detect Low
Reset Time High
Reset Time Low
Parameters
“Reset Pulse”
1-Wire Tx
Figure 8. Write 0 Sequence Timing Diagram
OW1
Figure 7. 1-Wire RPP Timing Diagram
Table 29
OVDD. and Vix(ac) is expected to track variation of OVDD. Vix(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 28
OW4
Typ.
512
511
—
—
Freescale Semiconductor
lists the RPP timing
Max.
240
60
—
—
Units
us
us
us
us