MC94MX21DVKN3 Freescale, MC94MX21DVKN3 Datasheet - Page 47

• Manufacturer Part Number: MC94MX21DVKN3
• Manufacturer: Freescale

Specifications of MC94MX21DVKN3

• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

1. t
2. t
Freescale Semiconductor
Ref
No.
4H
4S
HZ
RCD
5
5
5
6
7
7
7
8
= SDRAM data out high-impedance time, external SDRAM memory device dependent parameter.
= SDRAM clock cycle time. The t
SDCLK
Address setup time
Address hold time
SDRAM access time (CL = 3)
SDRAM access time (CL = 2)
SDRAM access time (CL = 1)
Data out hold time
Data out high-impedance time (CL = 3)
Data out high-impedance time (CL = 2)
Data out high-impedance time (CL = 1)
Active to read/write command period (RC = 1)
ADDR
DQM
RAS
CAS
WE
DQ
CS
4
/ BA
Table 30. SDRAM Read Cycle Timing Parameter (Continued)
Parameter
1
5
Figure 39. SDRAM Write Cycle Timing Diagram
3
RCD
6
2
MC94MX21 Technical Data, Rev. 1.
setting can be found in the i.MX21 reference manual.
ROW/BA
Minimum
t
3.67
2.95
RCD
7
–
–
–
–
–
–
2
1.8 V ± 0.1 V
2
8
Maximum
COL/BA
DATA
t
t
HZ
HZ
5.4
6.0
–
–
–
–
–
–
1
1
9
Minimum
t
RCD
2
2
–
–
–
–
–
–
2
3.0 V ± 0.3 V
2
Maximum
t
t
HZ
HZ
5.4
6.0
–
–
–
–
–
Specifications
–
1
1
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
47