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MC9S12DT256 Device User Guide V03.07
A.3.1.3 Sector Erase
Erasing a 512 byte Flash sector or a 4 byte EEPROM sector takes:
The setup time can be ignored for this operation.
A.3.1.4 Mass Erase
Erasing a NVM block takes:
The setup time can be ignored for this operation.
A.3.1.5 Blank Check
The time it takes to perform a blank check on the Flash or EEPROM is dependant on the location of the
first non-blank word starting at relative address zero. It takes one bus cycle per word to verify plus a setup
of the command.
Conditions are shown in Table A-4 unless otherwise noted
Num C
1
D External Oscillator Clock (MC9S12DT256C< V, M)
2
D Bus frequency for Programming or Erase Operations
3
D Operating Frequency
4
P Single Word Programming Time
5
D Flash Burst Programming consecutive word
6
D Flash Burst Programming Time for 32 Words
7
P Sector Erase Time
8
P Mass Erase Time
9
D Blank Check Time Flash per block
10
D Blank Check Time EEPROM per block
NOTES:
1. Restrictions for oscillator in crystal mode apply!
2. Minimum Programming times are achieved under maximum NVM operating frequency f
f
.
bus
104
≈
t
4000
era
≈
t
20000
mass
≈
t
location t
check
Table A-11 NVM Timing Characteristics
Rating
4
4
1
⋅
---------------------
f
NVMOP
1
⋅
---------------------
f
NVMOP
⋅
⋅
10 t
+
cyc
cyc
Symbol
Min
f
0.5
NVMOSC
f
1
NVMBUS
f
150
NVMOP
2
t
46
swpgm
t
2
20.4
bwpgm
2
t
678.4
brpgm
t
5
20
era
t
5
100
mass
6
t
11
check
t
6
11
check
NVMOP
Typ
Max
Unit
1
MHz
50
MHz
200
kHz
µs
3
74.5
µs
3
31
µs
3
1035.5
3
ms
26.7
3
ms
133
7
t
32778
7
t
2058
and maximum bus frequency
cyc
cyc
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