32186 datasheet(185/1032 Pages) RENESAS

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INTERNAL MEMORY

6-43

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

6.6.4 Flash Programming Time (Reference)

The following shows the time needed to program internal flash memory for reference.

(1) M32186F8

[1] Transfer time by SIO (When the capacity of transfer data : 1024KB)

1 / 57600bps x 1(fram) x 11(the number of transfer bit) x 1024KB = approx. 200.2 [s]

[2] Flash writing time

Other than 4KB block

(1024KB - 4KB x 2) / 8byte x 100µs = approx.13.0 [s]

4KB block

4KB x 2 / 8byte x 200µs = approx.0.2 [s]

Total 13.2 [s]

[3] Erase time (all areas)

0.3s x 3block + 0.5s x 1block + 0.7s x 1block + 1.2s x 15block = 20.1 [s]

[4] Total flash writing time (1024KB all areas)

During 57600bps connection,flash writing time to serial connection is so short that it is able to be

ignored For this reason, flash writing time is calculable with the following formula.

[1] + [3] = approx.220.3 [s]

In addition, the quickest data writing time with high speed is by speeding up serial connection or other

means is calculable with the following formula.

[2] + [3] = approx.33.3 [s]

(2) M32185F4

[1] Transfer time by SIO (When the capacity of transfer data : 512KB)

1 / 57600bps x 1(fram) x 11(the number of transfer bit) x 512KB = approx. 100.1 [s]

[2] Flash writing time

Other than 4KB block

(512KB - 4KB x 2) / 8byte x 100ms = approx.6.5 [s]

4KB block

4KB x 2 / 8byte x 200ms = approx.0.2 [s]

Total 6.7 [s]

[3] Erase time (all areas)

0.3s x 3block + 0.5s x 1block + 0.7s x 1block + 1.2s x 7block = 10.5 [s]

[4] Total flash writing time (512KB all areas)

During 57600bps connection,flash writing time to serial connection is so short that it is able to be

ignored For this reason, flash writing time is calculable with the following formula.

[1] + [3] = approx.110.6 [s]

In addition, the quickest data writing time with high speed is by speeding up serial connection or other

means is calculable with the following formula.

[2] + [3] = approx.17.2 [s]

6.6 Programming Internal Flash Memory

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