MCIMX31LCVMN4D Freescale, MCIMX31LCVMN4D Datasheet - Page 21

• Manufacturer Part Number: MCIMX31LCVMN4D
• Manufacturer: Freescale

Specifications of MCIMX31LCVMN4D

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Figure 8
the timing parameters.
4.3.5
This section discusses ATA parameters. For a detailed description, refer to the ATA specification.
The user needs to use level shifters for 3.3 Volt or 5.0 Volt compatibility on the ATA interface.
The use of bus buffers introduces delay on the bus and introduces skew between signal lines. These factors
make it difficult to operate the bus at the highest speed (UDMA-5) when bus buffers are used. If fast
UDMA mode operation is needed, this may not be compatible with bus buffers.
Another area of attention is the slew rate limit imposed by the ATA specification on the ATA bus.
According to this limit, any signal driven on the bus should have a slew rate between 0.4 and 1.2 V/ns with
a 40 pF load. Not many vendors of bus buffers specify slew rate of the outgoing signals.
Freescale Semiconductor
OW5
OW6
OW7
OW8
OW9
depicts Write 1 Sequence timing,
ID
ID
ATA Electrical Specifications (ATA Bus, Bus Buffers)
(BATT_LINE)
1-Wire bus
1-Wire bus
(BATT_LINE)
Write 0 Low Time
Transmission Time Slot
Write 1 / Read Low Time
Transmission Time Slot
Release Time
Parameter
Parameter
Table 19. WR0 Sequence Timing Parameters
Figure 8. Write 1 Sequence Timing Diagram
MCIMX31C/MCIMX31LC Technical Data, Rev. 4.3
Figure 9. Read Sequence Timing Diagram
Table 20. WR1/RD Timing Parameters
OW7
OW7
Figure 9
OW9
t
t
Symbol
depicts the Read Sequence timing, and
Symbol
RELEASE
WR0_low
t
t
t
LOW1
SLOT
SLOT
OW8
OW8
OW5
Min
Min
60
60
15
1
Typ
100
117
Typ
117
—
5
Electrical Characteristics
Max
Max
120
120
120
15
45
Table 20
Units
Units
µs
µs
µs
µs
µs
lists
21