Datasheet

Figure 11-3. Flash Size

2 * 8 Kbytes

1 * 112 Kbytes

7 * 128 Kbytes

2 * 8 Kbytes

1 * 112 Kbytes

3 * 128 Kbytes

2 * 8 Kbytes

1 * 112 Kbytes

15 * 128 Kbytes

Flash 2 Mbytes Flash 1 Mbyte Flash 512 Kbytes

Erasing the memory can be performed:

•

Chip Erase

• By block of 8 Kbytes

• By sector of 128 Kbytes

• By 512-byte page

– Erase memory by page is possible only in an 8 Kbyte sector

– EWP and EWPL commands can be only used in 8 Kbyte sectors

The memory has one additional reprogrammable page that can be used as page signature by the user. It is

accessible through specific modes, for erase, write and read operations. Erase pin assertion will not erase the User

Signature page.

11.1.5.2 Enhanced Embedded Flash Controller

Each Enhanced Embedded Flash Controller manages accesses performed by the masters of the system. It enables

reading the Flash and writing the write buffer. It also contains a User Interface, mapped on the APB.

The Enhanced Embedded Flash Controller ensures the interface of the Flash block.

It manages the programming, erasing, locking and unlocking sequences of the Flash using a full set of commands.

One of the commands returns the embedded Flash descriptor definition that informs the system about the Flash

organization, thus making the software generic.

11.1.5.3 Flash Speed

The user must set the number of wait states depending on the system frequency.

For more details, refer to Embedded Flash Characteristics.

11.1.5.4 Lock Regions

Several lock bits are used to protect write and erase operations on lock regions. A lock region is composed of several

consecutive pages, and each lock region has its associated lock bit.

Table 11-2. Flash Lock Bits

Flash Size (Kbytes) Number of Lock Bits Lock Region Size

2048 128 16 Kbytes

SAM E70/S70/V70/V71 Family

Memories

echnology Inc.

Datasheet

DS60001527D-page 57