C8051F045 데이터 시트보기 (PDF) - Silicon Laboratories
부품명
상세내역
제조사
C8051F045 Datasheet PDF : 328 Pages
| |||
C8051F040/1/2/3/4/5/6/7
Read and Write/Erase Security Bits.
(Bit 7 is MSB.)
Bit
Memory Block
C8051F040/1/2/3/4/5
C8051F046/7
7
0xE000 - 0xFDFD
No effect
6
0xC000 - 0xDFFF
No effect
5
0xA000 - 0xBFFF
No effect
4
0x8000 - 0x9FFF
No effect
3
0x6000 - 0x7FFF 0x6000 - 0x7FFD
2
0x4000 - 0x5FFF 0x4000 - 0x5FFF
1
0x2000 - 0x3FFF 0x2000 - 0x3FFF
0
0x0000 - 0x1FFF 0x0000 - 0x1FFF
SFLE = 0
C8051F040/1/2/3/4/5
Reserved
Read Lock Byte
Write/Erase Lock Byte
0xFE00
0xFDFF
0xFDFE
0xFDFD
SFLE = 1
Scratchpad Memory
(Data only)
0x007F
0x0000
Program/Data
Memory Space
Software Read Limit
0x0000
C8051F046/7
Reserved
Read Lock Byte
Write/Erase Lock Byte
0x8000
0x7FFF
0x7FFE
0x7FFD
Program/Data
Memory Space
Software Read Limit
0x0000
Flash Read Lock Byte
Bits7-0: Each bit locks a corresponding block of memory. (Bit7 is MSB).
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.
Flash Write/Erase Lock Byte
Bits7-0: Each bit locks a corresponding block of memory.
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.
Flash access Limit Register (FLACL)
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
Rev. 1.5
181
Share Link: 