C8051F34A-GMR Silicon Labs, C8051F34A-GMR Datasheet - Page 111

• Manufacturer Part Number: C8051F34A-GMR
• Description: 8-bit Microcontrollers - MCU 48 MIPS 64KB 10ADC
• Manufacturer: Silicon Labs

Specifications of C8051F34A-GMR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

The level of FLASH security depends on the FLASH access method. The three FLASH access methods
that can be restricted are reads, writes, and erases from the C2 debug interface, user firmware executing
on unlocked pages, and user firmware executing on locked pages.
Accessing FLASH from the C2 debug interface:
Accessing FLASH from user firmware executing on an unlocked page:
Accessing FLASH from user firmware executing on a locked page:
1. Any unlocked page may be read, written, or erased.
2. Locked pages cannot be read, written, or erased.
3. The page containing the Lock Byte may be read, written, or erased if it is unlocked.
4. Reading the contents of the Lock Byte is always permitted.
5. Locking additional pages (changing ‘1’s to ‘0’s in the Lock Byte) is not permitted.
6. Unlocking FLASH pages (changing ‘0’s to ‘1’s in the Lock Byte) requires the C2 Device Erase
7. The Reserved Area cannot be read, written, or erased.
1. Any unlocked page except the page containing the Lock Byte may be read, written, or erased.
2. Locked pages cannot be read, written, or erased.
3. The page containing the Lock Byte cannot be erased. It may be read or written only if it is
4. Reading the contents of the Lock Byte is always permitted.
5. Locking additional pages (changing ‘1’s to ‘0’s in the Lock Byte) is not permitted.
6. Unlocking FLASH pages (changing ‘0’s to ‘1’s in the Lock Byte) is not permitted.
7. The Reserved Area cannot be read, written, or erased. Any attempt to access the reserved
1. Any unlocked page except the page containing the Lock Byte may be read, written, or erased.
2. Any locked page except the page containing the Lock Byte may be read, written, or erased.
3. The page containing the Lock Byte cannot be erased. It may only be read or written.
4. Reading the contents of the Lock Byte is always permitted.
5. Locking additional pages (changing ‘1’s to ‘0’s in the Lock Byte) is not permitted.
6. Unlocking FLASH pages (changing ‘0’s to ‘1’s in the Lock Byte) is not permitted.
7. The Reserved Area cannot be read, written, or erased. Any attempt to access the reserved
command, which erases all FLASH pages including the page containing the Lock Byte and the
Lock Byte itself.
unlocked.
area, or any other locked page, will result in a FLASH Error device reset.
area, or any other locked page, will result in a FLASH Error device reset.
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
Rev. 1.3
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