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6.2 Integrated Flash Memory

– 4Mbit size

– 8 parameter blocks of 4 Kword (top configuration)

– 7 main blocks of 32 Kword

– 120ns access time

– see datasheet of standalone product M28R400CT for more detailed information.

Figure 4. Block Addresses

6.2.1

Flash Signal Descriptions

– Write Protect (nwp)

Write protect is an input that gives an additional hardware protection for each block. When Write Protect

is

≤ 0.4V the Lock-Down is enabled and the protection status of the flash blocks cannot be changed.

When Write Protect is

≥ (vddq - 0.4V), the Lock-Down is disabled and the flash memory blocks can be

locked or unlocked.

– Reset (nrp)

The Reset input provides a hardware reset of the memory. When reset is

≤ 0.4V, the memory is in reset

mode: the outputs are high impedant and the current consumption is minimized. After Reset all blocks

are in Locked state. When Reset is

≥ (vddq - 0.4V), the device is in normal operation. Exiting reset mode

4 KWords

3FFFF

3F000

32 KWords

0FFFF

08000

32 KWords

07FFF

00000

M28R400CT

Top Boot Block Addresses

4 KWords

38FFF

38000

32 KWords

30000

37FFF

Total of 8

4 KWord Blocks

Total of 7

32 KWord Blocks