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Appendix A Electrical Characteristics
MC9S12XF - Family Reference Manual, Rev.1.19
Freescale Semiconductor
1203
A.3.1.15
Full Partition D-Flash (FCMD=0x0F)
The maximum time for partitioning the D-ash (ERPART=16, DFPART=0) is given by :
A.3.1.16
Erase Verify D-Flash Section (FCMD=0x10)
Erase Verify D-Flash for a given number of words NW is given by .
A.3.1.17
D-Flash Programming (FCMD=0x11)
D-Flash programming time is dependent on the number of words being programmed and their location
with respect to a row boundary, because programming across a row boundary requires extra steps. The D-
Flash programming time is specied for different cases (1,2,3,4 words and 4 words across a row boundary)
at a 50MHz bus frequency. The typical programming time can be calculated using the following equation,
whereby Nw denotes the number of words; BC=0 if no boundary is crossed and BC=1 if a boundary is
crossed.
The maximum programming time can be calculated using the following equation
A.3.1.18
Erase D-Flash Sector (FCMD=0x12)
Typical D-Flash sector erase times are those expected on a new device, where no margin verify fails occur.
They can be calculated using the following equation.
Maximum D-Fash sector erase times can be calculated using the following equation.
The D-Flash sector erase time on a new device is ~5ms and can extend to 20ms as the ash is cycled.
t
350
1
f
NVMBUS
-----------------------------
=
t
part
21800
1
f
NVMOP
-------------------------
400000
1
f
NVMBUS
-----------------------------
t
mass
+
+
≈
t
check
840
N
W
+
()
1
f
NVMBUS
-----------------------------
≈
t
dpgm
15
54 N
w
()
16 BC
()
++
()
1
f
NVMOP
------------------
460
640 N
W
()
500 BC
()
++
()
1
f
NVMBUS
---------------------
+
=
t
dpgm
15
56 N
w
()
16 BC
()
++
()
1
f
NVMOP
------------------
460
840 N
W
()
500 BC
()
++
()
1
f
NVMBUS
---------------------
+
=
t
eradf
5025
1
f
NVMOP
-------------------------
700
1
f
NVMBUS
-----------------------------
+
≈
t
eradf
20100
1
f
NVMOP
-------------------------
3300
1
f
NVMBUS
-----------------------------
+
≈