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MC68HC08JL8 Datasheet, PDF (194/212 Pages) Freescale Semiconductor, Inc – Microcontrollers
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Electrical Specifications
17.14 Memory Characteristics
Table 17-12. Memory Characteristics
Characteristic
RAM data retention voltage
FLASH program bus clock frequency
FLASH read bus clock frequency
FLASH page erase time
FLASH mass erase time
FLASH PGM/ERASE to HVEN set up time
FLASH high-voltage hold time
FLASH high-voltage hold time (mass erase)
FLASH program hold time
FLASH program time
FLASH return to read time
FLASH cumulative program hv period
FLASH row erase endurance(6)
FLASH row program endurance(7)
FLASH data retention time(8)
Symbol
Min
VRDR
1.3
—
1
fread(1)
terase(2)
tmerase(3)
tnvs
tnvh
tnvhl
tpgs
tprog
trcv(4)
tHV(5)
—
32 k
4
4
10
5
100
5
30
1
—
10 k
—
10 k
—
10
Max
Unit
—
V
—
MHz
8M
Hz
—
ms
—
ms
—
µs
—
µs
—
µs
—
µs
40
µs
—
µs
4
ms
—
cycles
—
cycles
—
years
1. fread is defined as the frequency range for which the FLASH memory can be read.
2. If the page erase time is longer than terase (Min), there is no erase-disturb, but it reduces the endurance of the FLASH
memory.
3. If the mass erase time is longer than tmerase (Min), there is no erase-disturb, but it reduces the endurance of the FLASH
memory.
4. trcv is defined as the time it needs before the FLASH can be read after turning off the high voltage charge pump, by clearing
HVEN to logic 0.
5. tHV is defined as the cumulative high voltage programming time to the same row before next erase.
tHV must satisfy this condition: tnvs + tnvh + tpgs + (tprog × 32) ≤ tHV max.
6. The minimum row endurance value specifies each row of the FLASH memory is guaranteed to work for at least this many
erase / program cycles.
7. The minimum row endurance value specifies each row of the FLASH memory is guaranteed to work for at least this many
erase / program cycles.
8. The FLASH is guaranteed to retain data over the entire operating temperature range for at least the minimum time speci-
fied.
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
194
Freescale Semiconductor
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