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MC68HC908JL3E Datasheet, PDF (222/226 Pages) Motorola, Inc – Microcontrollers
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MC68HLC908JL3E/JK3E/JK1E
A.6.6 Memory Characteristics
The FLASH memory can only be read at an operating voltage of 2.2 to
5.5V. Program and erase are achieved at an operating voltage of 2.7 to
5.5V. The program and erase parameters in Table A-6 are for
VDD = 2.7 to 5.5V only.
Table A-6. Memory Characteristics
Characteristic
Symbol
Min
Max
Unit
RAM data retention voltage
VRDR
1.3
—
V
FLASH program bus clock frequency
—
1
—
MHz
FLASH read bus clock frequency
fRead(1)
32 k
8M
Hz
FLASH page erase time
tErase(2)
1
—
ms
FLASH mass erase time
tMErase(3)
4
—
ms
FLASH PGM/ERASE to HVEN set up time
tnvs
10
—
µs
FLASH high-voltage hold time
tnvh
5
—
µs
FLASH high-voltage hold time (mass erase)
tnvhl
100
—
µs
FLASH program hold time
tpgs
5
—
µs
FLASH program time
tPROG
30
40
µs
FLASH return to read time
trcv(4)
1
—
µs
FLASH cumulative program hv period
FLASH row erase endurance(6)
FLASH row program endurance(7)
FLASH data retention time(8)
tHV(5)
—
—
—
—
4
ms
10 k
—
cycles
10 k
—
cycles
10
—
years
NOTES:
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 specified.
Technical Data
222
MC68H(R)C908JL3E/JK3E/JK1E — Rev. 2.0
MC68HLC908JL3E/JK3E/JK1E
MOTOROLA
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