MCIMX255AJM4AR2 Freescale Semiconductor, MCIMX255AJM4AR2 Datasheet - Page 81

• Manufacturer Part Number: MCIMX255AJM4AR2
• Description: Processors - Application Specialized IMX25 1.2 AUTO
• Manufacturer: Freescale Semiconductor

Specifications of MCIMX255AJM4AR2

• Core: ARM926EJ-S
• Processor Series: MCIMX25
• Maximum Clock Frequency: 400 MHz
• Instruction / Data Cache Memory: 16 KB
• Data Ram Size: 128 KB
• Operating Supply Voltage: 1.15 V to 1.52 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: MAPBGA-400
• Interface Type: USB
• Memory Type: DDR2
• Minimum Operating Temperature: - 40 C

Figure 53
Table 60
respectively the conditions and signals cited in
Freescale Semiconductor
SCKT
SCKR
FST
HCKT
HCKR
No.
62
63
64
Symbol
i ck a
i ck s
x ck
i ck
Clock cycle
Clock high period
For internal clock
For external clock
Clock low period
For internal clock
For external clock
SCKR (output)
describes the general timing requirements for the ESAI module.
shows the ESAI HCKR timing diagram.
Signal Name
Internal clock
External clock
Internal clock, asynchronous mode
Internal clock, synchronous mode
4
HCKR
Characteristics
Significance
i.MX25 Applications Processor for Automotive Products, Rev. 9
1 2
Table 60. ESAI General Timing Requirements
Transmit clock
Receive clock
Transmit frame sync
Transmit high-frequency clock
Receive high-frequency clock
95
Table 58. ESAI Timing Conditions
Figure 53. ESAI HCKR Timing
Table 59. ESAI Signals
In the i.MX25, the internal clock frequency is equal to the IP bus frequency
(133 MHz)
The external clock may be derived from the CRM module or other external
clock sources
In asynchronous mode, SCKT and SCKR are different clocks
In synchronous mode, SCKT and SCKR are the same clock
Symbol
t
SSICC
Table
—
—
—
—
—
97
60.
Expression
2
2
4
4
2
2
T c
T c
—
T c
T c
T c
T c
Significance
9.0
9.0
3
Comments
Min.
30.0
30.0
15
15
—
Table 58
6
6
Max.
—
—
—
—
—
—
—
and
Table 59
Condition
i ck
i ck
—
—
—
—
describe
Unit
ns
ns
ns
81