MCIMX257DJM4A Freescale, MCIMX257DJM4A Datasheet - Page 42

• Manufacturer Part Number: MCIMX257DJM4A
• Manufacturer: Freescale

Specifications of MCIMX257DJM4A

• Operating Temperature (min): -20C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

2. Minimum condition for tps: wcs model, 1.1 V, I/O 1.7 V, and 105 °C. tps is measured between VIL to VIH for rising edge and
3. Maximum condition for tdit: bcs model, 1.3 V, I/O 1.9 V, and –40 °C.
4. Maximum condition for tpi and trfi: wcs model, 1.1 V, I/O 1.7 V and 105 °C. Minimum condition for tpi and trfi: bcs model, 1.3 V,
Table 29
3.7
This section contains the timing and electrical parameters for i.MX25 modules.
3.7.1
Figure 7
42
1
2
3
4
AC input logic high
AC input logic low
AC differential input voltage
AC differential cross point voltage for input
AC differential cross point voltage for output
between VIH to VIL for falling edge.
I/O 1.9 V and –40 °C. Input transition time from pad is 5 ns (20%–80%).
Note that the Jedec SSTL_18 specification (JESD8-15a) for an SSTL interface for class II operation supersedes any
specification in this document.
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.
1-Wire bus
(OWIRE_LINE)
shows the reset and presence pulses (RPP) timing for 1-Wire.
shows the AC requirements for DDR2 I/O.
Module Timing and Electrical Parameters
1-Wire Timing Parameters
Parameter
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 6
2
1
“Reset Pulse”
1-Wire Tx
OW1
Table 29. AC Requirements for DDR2 I/O
Figure 7. 1-Wire RPP Timing Diagram
3
4
Symbol
VIH(ac)
Vox(ac)
VIL(ac)
Vid(ac)
Vix(ac)
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)
OVDD/2 + 0.25
OVDD/2–0.175
OVDD/2–0.125
OW3
1-Wire Memory Device
Min.
–0.3
OW2
0.5
“Presence Pulse”
OW4
OVDD/2 + 0.175
OVDD/2 + 0.125
OVDD/2 – 0.25
OVDD + 0.3
OVDD + 0.6
Max.
Freescale Semiconductor
Units
V
V
V
V
V