MCIMX251AJM4 Freescale Semiconductor, MCIMX251AJM4 Datasheet - Page 82

IC MPU IMX25 AUTO 400MAPBGA

MCIMX251AJM4

Manufacturer Part Number
MCIMX251AJM4
Description
IC MPU IMX25 AUTO 400MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX25r
Datasheet

Specifications of MCIMX251AJM4

Core Processor
ARM9
Core Size
32-Bit
Speed
400MHz
Connectivity
1-Wire, CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
Peripherals
DMA, I²S, POR, PWM, WDT
Number Of I /o
128
Program Memory Type
External Program Memory
Ram Size
144K x 8
Voltage - Supply (vcc/vdd)
1.15 V ~ 1.52 V
Data Converters
A/D 3x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
400-MAPBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-

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Figure 53
Table 60
respectively the conditions and signals cited in
82
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. 8
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 × T c − 9.0
2 × T c − 9.0
4 × T c
4 × T c
2 × T c
2 × T c
Significance
3
Comments
Min.
30.0
30.0
15
15
Table 58
6
6
Max.
and
Freescale Semiconductor
Table 59
Condition
i ck
i ck
describe
Unit
ns
ns
ns

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