MC9S12A128 Datasheet, PDF (71/92 Pages) Motorola, Inc – Microcontroller unit (MCU)

MC9S12A128 Device Guide — V01.01
A.3.1.3 Sector Erase
Erasing a 512 byte Flash sector or a 4 byte EEPROM sector takes:
t
era
≈
4000
⋅
-----------1-------------
fNVMOP
The setup time can be ignored for this operation.
A.3.1.4 Mass Erase
Erasing a NVM block takes:
tm
as
s
≈
20000
⋅
-----------1-------------
fNVMOP
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.
tcheck ≈ location ⋅ tcyc + 10 ⋅ tcyc
Table A-11 NVM Timing Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C
Rating
Symbol Min
Typ
Max
Unit
1 D External Oscillator Clock
f_NVMOSC
0.5
—
50⁽¹⁾
MHz
2 D Bus frequency for Programming or Erase Operations f_NVMBUS
1
—
MHz
3 D Operating Frequency
f_NVMOP
150
—
200
kHz
4 P Single Word Programming Time
t_swpgm
46⁽²⁾
—
74.5⁽³⁾
µs
5 D _{Flash Burst Programming consecutive word} ⁽⁴⁾
t_bwpgm
20.4⁽²⁾
—
31⁽³⁾
µs
6 D _{Flash Burst Programming Time for 32 Words} ⁴
t_brpgm
678.4⁽²⁾
—
1035.5⁽³⁾
µs
7 P Sector Erase Time
t_era
20⁽⁵⁾
—
26.7⁽³⁾
ms
8 P Mass Erase Time
t_mass
100⁽⁵⁾
—
133⁽³⁾
ms
9 D Blank Check Time Flash per block
t_check
11⁽⁶⁾
—
32,778⁽⁷⁾
t_cyc
10 D Blank Check Time EEPROM per block
t_check
11⁽⁶⁾
—
2058⁽⁷⁾
t_cyc
NOTES:
1. Restrictions for oscillator in crystal mode apply!
2. Minimum Programming times are achieved under maximum NVM operating frequency f_NVMOP and maximum bus
frequency f_bus.
3. Maximum Erase and Programming times are achieved under particular combinations of f_NVMOP and bus frequency f_bus.
Refer to formulae in A.3.1.1 Single Word Programming- A.3.1.4 Mass Erase for guidance.
4. urst Programming operations are not applicable to EEPROM
5. Minimum Erase times are achieved under maximum NVM operating frequency f_NVMOP.
6. Minimum time, if first word in the array is not blank
7. Maximum time to complete check on an erased block
71