Shulou(Shulou.com)06/03 Report--

Atmel-42129-sam-d20

The Ateml chip uses fuse bit to set the clock, start time, enable some functions, set the Boot area,

Secret bits, it is troublesome to lock the chip, and it is necessary to know some bit settings about MCU power consumption.

-first byte-

BOOTPROT [2:0] size of the bootloader size (Bytes) bootstrapper

7 0 (default)

6 512

5 1024

4 2048

3 4096

2 8192

1 16384

0 32768

[3] retention

EEPROM [6:4] EEPROM area sizes (EEPROM size) byte

7 0 (default)

6 256

5 512

4 1024

3 2048

2 4096

1 8192

0 16384

The true size of EEPROM depends on the simulation software.

[7] retention

-second byte-

BOD is power-off detection.

BOD33Level [13:8] threshold level after BOD33 is powered on

The default value is 7

BOD33 Enable [14] Default value = 1

Total below [15]

-Byte 3-

BOD33 Action [16:15] Default value = 1

[23:17] retention

-4th byte-

[24] retention

WDT Enable [25] Default value = 0

WDT Always-On [26] Default value = 0

WDT Period [30:27] Default value = 0xB (16384 clock cycles)

Total of the following [31]

-5th byte-

WDT Window [34:31] Default value, WINDOW_1 = 0x5 (window timer)

256 clocks cycles

WDT EWOFFSET [38:35] Default value = 0xB (window timer)

WDT WEN [39] Default value = 0

-Byte 6-

BOD33 Hysteresis [40] Power-on lag configuration Default value = 0

[41] retention

The register configuration inside the voltage, which cannot be changed after writing (Default value = 0)

[47:42] retention

-7, 8 bytes-

LOCK [63:48] Default value = 0xFFFF

0: The corresponding lock region is locked.

1: The corresponding lock region is not locked.

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