MCIMX251AJM4 Freescale Semiconductor, MCIMX251AJM4 Datasheet - Page 57

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

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: -

3.7.6.1
3.7.6.1.1
The following diagrams and tables specify the timings related to the SDRAMC module which interfaces
SDRAM.
Freescale Semiconductor
SD1
SD2
SD3
SD4
SD5
ID
SDCLK
SDCLK
ADDR
DQM
RAS
CAS
WE
DQ
CS
SDRAM clock high-level width
SDRAM clock low-level width
SDRAM clock cycle time
CS, RAS, CAS, WE, DQM, CKE setup time
CS, RAS, CAS, WE, DQM, CKE hold time
ESDCTL Electrical Specifications
SDRAM Memory Controller
SD4
SD6
SD4
ROW/BA
Table 44. DDR/SDR SDRAM Read Cycle Timing Parameters
i.MX25 Applications Processor for Automotive Products, Rev. 8
SD5
Figure 25. SDRAM Read Cycle Timing Diagram
SD5
SD7
Parameter
SD10
1
SD4
COL/BA
1
SD4
SD4
SD5
SD5
SD5
SD8
Note: CKE is high during the read/write cycle.
Data
SD1
SD9
SD3
SD2
Symbol
tCMH
tCMS
tCH
tCK
tCL
Min.
3.4
3.4
7.5
2.0
1.8
Max.
4.1
4.1
—
—
—
Unit
ns
ns
ns
ns
ns
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