MC9S12E Motorola, MC9S12E Datasheet - Page 130

• Manufacturer Part Number: MC9S12E
• Description: MC9S12E-Family Device User Guide V01.04
• Manufacturer: Motorola

Device User Guide — 9S12E128DGV1/D V01.04
B.5.1.4 Mass Erase
Erasing a NVM block takes:
The setup times can be ignored for this operation.
B.5.1.5 Blank Check
The time it takes to perform a blank check on the Flash 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.
B.5.2 NVM Reliability
The reliability of the NVM blocks is guaranteed by stress test during qualification, constant process
monitors and burn-in to screen early life failures.
Conditions are shown in Table A-4 unless otherwise noted
NOTES:
Num
1. Restrictions for oscillator in crystal mode apply!
2. Minimum Programming times are achieved under maximum NVM operating frequency f
3. Maximum Erase and Programming times are achieved under particular combinations of f
4. Minimum Erase times are achieved under maximum NVM operating frequency f
5. Minimum time, if first word in the array is not blank
6. Maximum time to complete check on an erased block.
130
1
2
3
4
5
6
7
8
9
cy f
Refer to formulae in Sections A.3.1.1 - A.3.1.4 for guidance.
bus
.
C
D
D
D
P
D
D
P
P
D
External Oscillator Clock
Bus frequency for Programming or Erase Operations
Operating Frequency
Single Word Programming Time
Flash Burst Programming consecutive word
Flash Burst Programming Time for 32 Words
Sector Erase Time
Mass Erase Time
Blank Check Time Flash per block
Freescale Semiconductor, Inc.
Table B-5 NVM Timing Characteristics
t
For More Information On This Product,
check
Rating
t
mass
≈
Go to: www.freescale.com
location t
≈
20000
⋅
⋅
cyc
---------------------
f
NVMOP
+
1
Symbol
f
f
NVMOSC
NVMBUS
f
t
t
NVMOP
t
t
10 t
swpgm
bwpgm
t
brpgm
mass
check
t
era
⋅
cyc
NVMOP
678.4
20.4
100
Min
150
46
20
0.5
11
NVMOP
.
1
2
4
5
NVMOP
4
2
2
and maximum bus frequen-
Typ
and bus frequency f bus.
1035.5
32778
74.5
26.7
Max
133
50
200
31
1
3
3
3
3
6
3
Unit
MHz
MHz
kHz
t
ms
ms
µs
µs
µs
cyc