mc68hc908mr24 Freescale Semiconductor, Inc, mc68hc908mr24 Datasheet - Page 377

• Manufacturer Part Number: mc68hc908mr24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

21.7 FLASH Memory Characteristics
MC68HC908MR24 — Rev. 4.1
Freescale Semiconductor
FLASH pages per row
FLASH bytes per page
FLASH read bus clock frequency
FLASH charge pump clock frequency
(see
FLASH block/bulk erase time
FLASH high-voltage kill time
FLASH return to read time
FLASH page program pulses
FLASH page program step size
FLASH cumulative program operation per row
FLASH HVEN low to MARGIN high time
FLASH MARGIN high to PGM low time
FLASH row erase endurance
FLASH row program endurance
FLASH data retention time
1.
2.
3. fls
4.
5.
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 temperature range for at least the minimum time specified.
between erase cycles
f
f
t
t
programming.
erase/program cycles.
erase/program cycles.
Read
Pump
Step
ROW
Pulses
4.5 FLASH Charge Pump Frequency
is defined as the amount of time during one page program cycle that HVEN is held high.
is defined as the frequency range for which the FLASH memory can be read.
is defined as the cumulative time a row can see the program voltage before the row must be erased before further
is defined as the charge pump clock frequency required for program, erase, and margin read operations.
is defined as the number of pulses used to program the FLASH using the required smart program algorithm.
Characteristic
(8)
(6)
(7)
Electrical Specifications
Control)
Description
fls
Symbol/
t
f
f
t
PROG
Pump
Read
ROW
t
Pulses
t
t
Erase
HVTV
t
t
HVD
VTP
—
—
—
Kill
(1)
(5)
(2)
(4)
(3)
32 K
Min
100
200
150
100
100
1.8
1.0
50
50
10
—
—
8
8
8.4 M
Max
100
2.5
1.2
—
—
—
—
—
—
—
—
8
8
8
Electrical Specifications
Page programming
Advance Information
Pulses
Cycles
Cycles
Pages
cycles
Units
Bytes
Years
MHz
ms
ms
Hz
s
s
s
s
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