MC9328MX21SCVK Freescale Semiconductor, MC9328MX21SCVK Datasheet - Page 49

• Manufacturer Part Number: MC9328MX21SCVK
• Description: IC MCU I.MX21 266MHZ 289-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX21r

Specifications of MC9328MX21SCVK

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 266MHz
• Connectivity: 1-Wire, EBI/EMI, I²C, IrDA, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 192
• Program Memory Type: ROMless
• Voltage - Supply (vcc/vdd): 1.45 V ~ 3.3 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 289-MAPBGA
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Compliant

Freescale Semiconductor
1. Precharge cycle timing is included in the write timing diagram.
2. t
Ref
No.
RP
SDCLK
1
2
3
4
5
6
7
8
9
ADDR
DQM
RAS
CAS
and t
WE
DQ
CS
SDRAM clock high-level width
SDRAM clock low-level width
SDRAM clock cycle time
Address setup time
Address hold time
Precharge cycle period
Active to read/write command delay
Data setup time
Data hold time
RCD
= SDRAM clock cycle time. These settings can be found in the i.MX21 reference manual.
BA
4
1
Parameter
3
5
Table 32. SDRAM Write Cycle Timing Parameter
1
Figure 40. SDRAM Refresh Timing Diagram
6
2
MC9328MX21 Technical Data, Rev. 3.4
Minimum
t
3.00
3.00
3.67
2.95
3.41
2.45
t
RCD
7.5
RP
1.8 V ± 0.1 V
2
2
7
Maximum
–
–
–
–
–
–
–
–
–
Minimum
t
t
RCD
7.5
RP
3
3
2
2
2
2
7
3.0 V ± 0.3 V
2
2
ROW/BA
Maximum
–
–
–
–
–
–
–
–
–
Specifications
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
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