mc94mx21 Freescale Semiconductor, Inc, mc94mx21 Datasheet - Page 46

• Manufacturer Part Number: mc94mx21
• Description: 333 And 350 Mhz
• Manufacturer: Freescale Semiconductor, Inc

Specifications
3.15
The following figures
to the SDRAMC module in the i.MX21.
46
Ref
No.
3S
3H
1
2
3
SDRAM clock high-level width
SDRAM clock low-level width
SDRAM clock cycle time
CS, RAS, CAS, WE, DQM setup time
CS, RAS, CAS, WE, DQM hold time
SDCLK
ADDR
DQM
RAS
CAS
SDRAM Memory Controller
WE
DQ
CS
3S
ROW/BA
4S
3S
(Figure 38
3H
Parameter
4H
3H
Table 30. SDRAM Read Cycle Timing Parameter
Figure 38. SDRAM Read Cycle Timing Diagram
through
8
COL/BA
MC94MX21 Technical Data, Rev. 1.4
3S
3S
Figure
3S
3H
3H
41) and their associated tables specify the timings related
5
3H
Minimum
Note: CKE is high during the read/write cycle.
3.00
3.00
4.78
3.03
7.5
Data
1.8 V ± 0.1 V
6
1
7
3
Maximum
–
–
–
–
–
2
Minimum
7.5
3
3
3
2
3.0 V ± 0.3 V
Freescale Semiconductor
Maximum
–
–
–
–
–
Unit
ns
ns
ns
ns
ns