64.5.5.1.1 Principle

The BUSRAM4KB Erase sequence is activated by the CLR signal.

The following table shows the runtime to perform a partial erase and a full erase.

Table 64-4. Erase Time
Erase fICLK Frequency (kHz) Unit
Min = 38 Typ = 64 Max = 90
Partial Erase 1.68 1.00 0.71 ms
Full Erase (4 Kbytes) 13.47 8.00 5.69

During the Erase sequence, the upper 1 Kbyte of memory (BUSRAM1KB) is accessible by the system.

The erase is a write of random values instead of erase to zero.