Memories and memory interfaces
Figure 5. EEPROM backup writes to FlexRAM
6.4.2 EzPort Switching Specifications
All timing is shown with respect to a maximum pin load of 50 pF and input signal
transitions of 3 ns.
Table 21. EzPort switching specifications
Num
EP1
EP1a
EP2
EP3
EP4
EP5
Description
Operating voltage
EZP_CK frequency of operation (all commands except
READ)
EZP_CK frequency of operation (READ command)
EZP_CS negation to next EZP_CS assertion
EZP_CS input valid to EZP_CK high (setup)
EZP_CK high to EZP_CS input invalid (hold)
EZP_D input valid to EZP_CK high (setup)
Min.
2.7
—
—
2 x tEZP_CK
15
0.0
15
Max.
3.6
fSYS/2
fSYS/8
—
—
—
—
Unit
V
MHz
MHz
ns
ns
ns
ns
Table continues on the next page...
MCF51QM128 Data Sheet, Rev. 6, 01/2012.
32
Freescale Semiconductor, Inc.