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6
6.5.4 Flash Write Time (for Reference)
The time required for writing to the internal flash memory is shown below for your reference.
(1) M32170F6
Transfer time by SIO (for a transfer data size of 768 KB)
1/57600 bps × 1 (frame) × 11 (number of transfer bits) × 768 KB
Flash write time
768 KB/256-byte block × 8 ms
Erase time (entire area)
50 ms × number of blocks = 750 [ms]
Total flash write time (entire 768 KB area)
• When communicating at 57600 bps using UART, the flash write time can be ignored
because it is very short compared to the serial communication time. Therefore, the flash
write time can be calculated using the equation below:
When writing data to flash memory at high speed by speeding up the serial
communication or by other means, the fastest write time possible is as follows:
(2) M32170F4
Transfer time by SIO (for a transfer data size of 512 KB)
1/57600 bps × 1 (frame) × 11 (number of transfer bits) × 512 KB
Flash write time
512 KB/256-byte block × 8 ms
Erase time (entire area)
50 ms × number of blocks = 550 [ms]
Total flash write time (entire 512 KB area)
• When communicating at 57600 bps using UART, the flash write time can be ignored
because it is very short compared to the serial communication time. Therefore, the flash
write time can be calculated using the equation below:
+
When writing data to flash memory at high speed by speeding up the serial
communication or by other means, the fastest write time possible is as follows:
+
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+
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151 [s]
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+
25 [s]
. =
101 [s]
.
. =
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17 [s]
6.5 Programming of the Internal Flash Memory
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24.6 [s]
. =
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16.4 [s]
6-40
INTERNAL MEMORY
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150.2 [s]
. =
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100.2 [s]
Ver.0.10
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