mcf5253 Freescale Semiconductor, Inc, mcf5253 Datasheet - Page 16

• Manufacturer Part Number: mcf5253
• Description: Mcf5253 Coldfire? Microprocessor Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical Specifications
Table 12
4.1
The SDRAM bus is a synchronous bus. Propagation delays, set-up times and hold times with respect to
the SDRAM clock BCLK are shown in
clock is not active, SDRAM interface is not valid and the external bus cannot be used.
16
Frequency
Frequency Tolerance
Frequency Stability Over Operating Temperature Range
ESR
Shunt Capacitance
Load Capacitance
shows the CRIN Crystal suggested parameters.
SDRAM Bus Timing
MCF5253 ColdFire Processor Data Sheet: Technical Data, Rev. 4
Parameter
BCLKE, SDXDQM, SDWE,
SDCS0, SDRAS, SDCAS
Table 12. CRIN Crystal Suggested Parameters
Figure 4. SDRAM Bus Timing Diagram
data (write)
Figure 4
BCLK
A[24:9]
and the parameters provided in
data (read)
D3
D1
D2
D4
D5
Min
5
–
–
–
–
–
Typ
40
18
–
–
–
7
Table
Freescale Semiconductor
16.94
Max
±50
±50
13. When BCLK
–
–
–
MHz
Unit
ppm
ppm
pF
pF
Ω