AT32UC3L0256 Atmel Corporation, AT32UC3L0256 Datasheet - Page 738

• Manufacturer Part Number: AT32UC3L0256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3L0256

• Flash (kbytes): 256 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 50 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 17
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Speed: No
• Usb Interface: No
• Spi: 5
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 460
• Analog Comparators: 8
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.62 to 3.6
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 35
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

31.2.2
31.2.2.1
32145A–12/2011
SAB Security Restrictions
Security measure and control location
Table 31-1.
The Service Access bus can be restricted by internal security measures. A short description of
the security measures are found in the table below.
A security measure is a mechanism to either block or allow SAB access to a certain address or
address range. A security measure is enabled or disabled by one or several control signals. This
is called the control location for the security measure.
These security measures can be used to prevent an end user from reading out the code pro-
grammed in the flash, for instance.
Table 31-2.
Below follows a more in depth description of what locations are accessible when the security
measures are active.
Table 31-3.
Note:
Security Measure
Secure RAM area
Secure flash area
Memory Service
Other accesses
Secure mode
programming
Security bit
User code
User page
Reserved
Name
Slave
HSB
Unit
1. Second Word of the User Page, refer to the Fuses Settings section for details.
SAB Slaves, Addresses and Descriptions
SAB Security Measures
Secure Mode SAB Restrictions
Control Location
UPROT + security
SECURE bits set
Address [35:32]
security bit set
Address Start
0x580000000
0x500000000
0x580800000
FLASHCDW
FLASHCDW
FLASHCDW
bit set
Other
0x5
0x6
-
Description
Alternative mapping for HSB space, for compatibility with
other 32-bit AVR devices.
Memory Service Unit registers
Unused
Description
Allocates a portion of the flash for secure code. This code
cannot be read or debugged. The User page is also locked.
Programming and debugging not possible, very restricted
access.
Restricts all access except parts of the flash and the flash
controller for programming user code. Debugging is not
possible unless an OS running from the secure part of the
flash supports it.
(USERPAGE[31:16] << 10)
(USERPAGE[15:0] << 10)
0x580000000 +
0x500000000 +
Address End
0x581000000
-
AT32UC3L0128/256
Access
Blocked
Blocked
Read
As normal
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