XC888LM datasheet(60/144 Pages) INFINEON

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XC886/888CLM

Functional Description

Data Sheet

V0.9, 2006-12

Table 19 shows the Flash data retention and endurance targets.

3.3.1

Flash Bank Sectorization

The XC886/888 product family offers Flash devices with either 24 Kbytes or 32 Kbytes

of embedded Flash memory. Each Flash device consists of Program Flash (P-Flash)

and Data Flash (D-Flash) bank(s) with different sectorization shown in Figure 11. Both

types can be used for code and data storage. The label “Data” neither implies that the

D-Flash is mapped to the data memory region, nor that it can only be used for data

storage. It is used to distinguish the different Flash bank sectorizations.

The 32-Kbyte Flash device consists of 6 P-Flash and 2 D-Flash banks, while the 24-

Kbyte Flash device consists of also of 6 P-Flash banks but with the upper 2 banks only

2 Kbytes each, and only 1 D-Flash bank. The XC886/888 ROM devices offer a single 4-

Kbyte D-Flash bank.

Table 19

Flash Data Retention and Endurance (Operating Conditions apply)

Retention

Endurance

1) One cycle refers to the programming of all wordlines in a sector and erasing of sector. The Flash endurance

data specified in Table 19 is valid only if the following conditions are fulfilled:

- the maximum number of erase cycles per Flash sector must not exceed 100,000 cycles.

- the maximum number of erase cycles per Flash bank must not exceed 300,000 cycles.

- the maximum number of program cycles per Flash bank must not exceed 2,500,000 cycles.

Size

Remarks

Program Flash

20 years

1,000 cycles

up to 32 Kbytes

2) If no Flash is used for data, the Program Flash size can be up to the maximum Flash size available in the

device variant. Having more Data Flash will mean less Flash is available for Program Flash.

for 32-Kbyte Variant

20 years

1,000 cycles

up to 24 Kbytes

for 24-Kbyte Variant

Data Flash

20 years

1,000 cycles

4 Kbytes

5 years

10,000 cycles

1 Kbyte

2 years

70,000 cycles

512 bytes

2 years

100,000 cycles

128 bytes

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