AN2156 Freescale Semiconductor / Motorola, AN2156 Datasheet - Page 37

• Manufacturer Part Number: AN2156
• Description: Programming and Erasing FLASH and EEPROM Memories on the MC68HC908AS60A/AZ60A
• Manufacturer: Freescale Semiconductor / Motorola

AN2156
MOTOROLA
1. Delay time calculated by dividing the number of cycles in the delay by the bus speed of
2. Most delta times are around 1.6 s. Since the instructions BSET and COM require four
3. These times refer to measured delays based on running the attached sample code. In that
of Delay
t
Freescale Semiconductor, Inc.
MERASE
t
Name
internal bus cycles, this additional time comes from the execution time of the instruction.
code, the points at which measurements were taken are defined by these markers.
ERASE
t
--------------------------------- -
2.4576 MHz
2.4576 MHz.
t
t
t
NVHL
NVS
NVH
RCV
For More Information On This Product,
1
Go to: www.freescale.com
Specified
> 100 s
Duration
4 cycles
> 10 s
> 1 ms
> 4 ms
> 5 s
> 1 s
Table 7. FLASH Erase Delay Times
=
1.627
Delay Time
Calculated
s
1.01 ms
4.01 ms
10.6 s
101 s
5.7 s
2.0 s
Evaluating Delay Times for the Sample Code
(1)
(S1 to E1)
Delay Time
(S2 to E2)
(S3 to E3)
(S4 to E4)
(S5 to E5)
(S6 to E6)
1.012 ms
12.24 s
102.8 s
4.02 ms
7.32 s
3.66 s
Actual
(3)
Application Note
Delta
1.64 s
1.62 s
1.66 s
1.6 s
10 s
2 s
(2)
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