C8051F537-ITR Silicon Labs, C8051F537-ITR Datasheet - Page 118
![no-image](/images/no-image-200.jpg)
C8051F537-ITR
Manufacturer Part Number
C8051F537-ITR
Description
8-bit Microcontrollers - MCU 2KB 12ADC 125C 20Pin MCU
Manufacturer
Silicon Labs
Datasheet
1.C8051F536-ITR.pdf
(220 pages)
Specifications of C8051F537-ITR
Product Category
8-bit Microcontrollers - MCU
Rohs
yes
Core
8051
Data Bus Width
8 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
2 KB
Data Ram Size
256 B
On-chip Adc
Yes
Package / Case
TSSOP-20
Mounting Style
SMD/SMT
A/d Bit Size
12 bit
A/d Channels Available
16
Interface Type
SPI, UART
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
16
Number Of Timers
3
On-chip Dac
No
Processor Series
C8051
Program Memory Type
Flash
Factory Pack Quantity
2500
Supply Voltage - Max
2.7 V, 5.25 V
Supply Voltage - Min
2 V, 2.7 V
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C8051F52x/F53x
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.
118
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 Erase—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
Rev. 1.4
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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