MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 222

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Electrical Specifications
18.14 Memory Characteristics
1. f
2. If the page erase time is longer than t
3. If the mass erase time is longer than t
4. t
5. t
6. The minimum row endurance value specifies each row of the FLASH memory is guaranteed to work for at least this many
7. The minimum row endurance value specifies each row of the FLASH memory is guaranteed to work for at least this many
8. The FLASH is guaranteed to retain data over the entire operating temperature range for at least the minimum time specified.
222
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
FLASH row program endurance
FLASH data retention time
memory.
memory.
HVEN to logic 0.
t
erase/program cycles.
erase/program cycles.
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
Read
rcv
HV
<1 K cycles
<10 K cycles
HV
is defined as the time it needs before the FLASH can be read after turning off the high voltage charge pump, by clearing
is defined as the cumulative high voltage programming time to the same row before next erase.
must satisfy this condition: t
is defined as the frequency range for which the FLASH memory can be read.
Characteristic
(8)
(6)
nvs
(7)
+ t
Erase
MErase
nvh
+ t
(Min), there is no erase disturb, but it reduces the endurance of the FLASH
pgs
(Min), there is no erase disturb, but it reduces the endurance of the FLASH
+ (t
Electrical Specifications
PROG
x 32)
t
HV
max.
t
Symbol
MErase
t
f
Erase
Read
t
V
t
t
PROG
t
rcv
HV
t
t
t
nvhl
RDR
—
nvs
nvh
pgs
—
—
—
(4)
(5)
(1)
(2)
(3)
32 k
10 k
10 k
Min
100
1.3
10
30
10
—
1
1
4
4
5
5
1
Max
8 M
—
—
—
—
—
—
—
—
—
40
—
—
—
—
4
MOTOROLA
Cycles
Cycles
Years
MHz
Unit
ms
ms
ms
Hz
us
us
us
us
us
us
V