C8051F040-TB Silicon Laboratories Inc, C8051F040-TB Datasheet - Page 181

• Manufacturer Part Number: C8051F040-TB
• Description: BOARD PROTOTYPING W/C8051F040
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F040-TB

• Contents: Board
• Processor To Be Evaluated: C8051F04x
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F040
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Read and Write/Erase Security Bits.
(Bit 7 is MSB.)
Flash Read Lock Byte
Bits7-0: Each bit locks a corresponding block of memory. (Bit7 is MSB).
Flash Write/Erase Lock Byte
Bits7-0: Each bit locks a corresponding block of memory.
Flash access Limit Register (FLACL)
Bit
7
6
5
4
3
2
1
0
C8051F040/1/2/3/4/5
0xE000 - 0xFDFD
0xC000 - 0xDFFF
0xA000 - 0xBFFF
0x8000 - 0x9FFF
0x6000 - 0x7FFF
0x4000 - 0x5FFF
0x2000 - 0x3FFF
0x0000 - 0x1FFF
0: Read operations are locked (disabled) for corresponding block across the JTAG interface.
1: Read operations are unlocked (enabled) for corresponding block across the JTAG inter-
face.
0: Write/Erase operations are locked (disabled) for corresponding block across the JTAG
interface.
1: Write/Erase operations are unlocked (enabled) for corresponding block across the JTAG
interface.
NOTE: When the highest block is locked, the security bytes may be written but not erased.
The content of this register is used as the high byte of the 16-bit Software Read Limit
address. This 16-bit read limit address value is calculated as 0xNN00 where NN is replaced
by content of this register on reset. Software running at or above this address is prohibited
from using the MOVX and MOVC instructions to read, write, or erase Flash locations below
this address. Any attempts to read locations below this limit will return the value 0x00.
Figure 15.1. Flash Program Memory Map and Security Bytes
Memory Block
0x6000 - 0x7FFD
0x4000 - 0x5FFF
0x2000 - 0x3FFF
0x0000 - 0x1FFF
C8051F046/7
No effect
No effect
No effect
No effect
C8051F040/1/2/3/4/5
Write/Erase Lock Byte
Write/Erase Lock Byte
Rev. 1.5
Software Read Limit
Software Read Limit
C8051F046/7
Read Lock Byte
Read Lock Byte
SFLE = 0
Reserved
Reserved
C8051F040/1/2/3/4/5/6/7
0xFE00
0xFDFF
0xFDFE
0xFDFD
0x0000
0x8000
0x7FFF
0x7FFE
0x7FFD
0x0000
Memory Space
Memory Space
Program/Data
Program/Data
Scratchpad Memory
SFLE = 1
(Data only)
0x007F
0x0000
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