C8051F530-TB Silicon Laboratories Inc, C8051F530-TB Datasheet - Page 117

• Manufacturer Part Number: C8051F530-TB
• Description: BOARD PROTOTYPE W/C8051F530
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F530-TB

• Contents: Board
• Processor To Be Evaluated: C8051F52xA and C8051F53xA
• Interface Type: USB
• Lead Free Status / RoHS Status: Vendor undefined / Vendor undefined
• For Use With/related Products: C8051F530
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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. Table 12.1 summarizes the Flash security
features of the ’F52x/’F52xA/’F53x/’F53xA devices.
Read, Write or Erase unlocked pages
(except page with Lock Byte)
Read, Write or Erase locked pages
(except page with Lock Byte)
Read or Write page containing Lock Byte
(if no pages are locked)
Read or Write page containing Lock Byte
(if any page is locked)
Read contents of Lock Byte
(if no pages are locked)
Read contents of Lock Byte
(if any page is locked)
Erase page containing Lock Byte
(if no pages are locked)
Erase page containing Lock Byte—Unlock all
pages (if any page is locked)
Lock additional pages
(change 1s to 0s in the Lock Byte)
Unlock individual pages
(change 0s to 1s in the Lock Byte)
Read, Write or Erase Reserved Area

C2 Device Eras—Erases all Flash pages including the page containing the Lock Byte.
Flash Error Reset—Not permitted; Causes Flash Error Device Reset (FERROR bit in RSTSRC is 1 after
reset).
- All prohibited operations that are performed via the C2 interface are ignored (do not cause device reset).
- Locking any Flash page also locks the page containing the Lock Byte.
- Once written to, the Lock Byte cannot be modified except by performing a C2 Device Erase.
- If user code writes to the Lock Byte, the Lock does not take effect until the next device reset.
Action
Table 12.1. Flash Security Summary
C8051F52x/F52xA/F53x/F53xA
Rev. 1.3
Not Permitted
Not Permitted
Not Permitted
Not Permitted
Not Permitted
Not Permitted
Erase Only
C2 Debug
C2 Device
Permitted
Permitted
Permitted
Permitted
Interface
an unlocked page
Flash Error Reset
Flash Error Reset
Flash Error Reset
Flash Error Reset Flash Error Reset
Flash Error Reset Flash Error Reset
Flash Error Reset Flash Error Reset
Flash Error Reset Flash Error Reset
Flash Error Reset Flash Error Reset
User Firmware executing from:
Permitted
Permitted
Permitted
a locked page
Permitted
Permitted
Permitted
Permitted
Permitted
Permitted
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