MCIMX27MOP4A Freescale, MCIMX27MOP4A Datasheet - Page 48

• Manufacturer Part Number: MCIMX27MOP4A
• Manufacturer: Freescale

Specifications of MCIMX27MOP4A

• Lead Free Status / RoHS Status: Compliant

Electrical Characteristics
4.2.3
This section describes the electrical information of the Parallel ATA module compliant with ATA/ATAPI-6
specification.
Parallel ATA module can work on PIO/Multi-Word DMA/Ultra DMA transfer modes. Each transfer mode
has different data transfer rate, Ultra DMA mode 4 data transfer rate is up to 100 MB/s. Parallel ATA
module interface consist of a total of 29 pins, Some pins act on different function in different transfer
mode. There are different requirements of timing relationships among the function pins conform with
ATA/ATAPI-6 specification and these requirements are configurable by the ATA module registers.
Below defines the AC characteristics of all the interface signals on all data transfer modes.
4.2.3.1
These are the general timing requirements for the ATA interface signals.
48
Note: SRISE and SFALL meets this requirement when measured at the sender’s connector from 10–90% of full signal
amplitude with all capacitive loads from 15 pf through 40 pf where all signals have the same capacitive load value.
SI1
SI2
SI3
ID
Rising edge slew rate for any signal on ATA
interface (see note)
Falling edge slew rate for any signal on ATA
interface (see note)
Host interface signal capacitance at the host
connector
OW7
OW8
OW9
ID
ATA Electrical Specifications
General Timing Requirements
The parallel ATA module is not available on the i.MX27L
Write 1/Read Low Time
Transmission Time Slot
Release Time
Parameter
Table 20. AC Characteristics of All Interface Signals
Parameter
Table 19. Write 1/Read Timing Parameters
i.MX27 and i.MX27L Data Sheet, Rev. 1.6
NOTE
Symbol
C
t
S
Symbol
S
RELEASE
host
t
rise
t
fall
LOW1
SLOT
Min
60
15
1
Min
—
—
—
Typical
117
—
5
Max
1.25
1.25
20
Freescale Semiconductor
Max
120
15
45
Units
µs
µs
µs
Unit
V/ns
V/ns
pF