FUJITSU MB91460 SERIES FR60 - Manual (Page 1029)

1013
Chapter 55 Flash Security
4.Register
4. Register
4.1 Flash Security Control Register
■
FSCR0: Address 7100h (Access: Byte (write), Word (read))
(See “ Meaning of Bit Attribute Symbols (Page No.10) ” for details of the attributes.)
• Bit31-24: Sequence activation
Continuously writing “ A5
H
” , “ 5A
H
” in the FSCR0[31:24] register will start a Flash Security Vector Re-fetch
sequence immediately after writing “ 5A
H
” . There is no time restrictions between “ A5
H
” and “ 5A
H
” , but if “ A5
H
” is
written followed by the one other than “ 5A
H
” , you should write “ A5
H
” again. If not, the Re-Fetch sequence
cannot be started even if “ 5A
H
” is written.
Continuously writing “ F0
H
” , “ 0F
H
” in the FSCR0[31:24] register will start a CRC32 checksum sequence
immediately after writing “ 0F
H
” . There is no time restrictions between “ F0
H
” and “ 0F
H
” , but if “ F0
H
” is written
followed by the one other than “ 0F
H
” , you should write “ F0
H
” again. If not, the CRC checksum sequence
cannot be started even if “ 0F
H
” is written.
31 30 29 28 27 26 25 24 bit
CRC31/
S7
CRC30/
S6
CRC29/
S5
CRC28/
S4
CRC27/
S3
CRC26/
S2
CRC25/
S1
CRC24/
S0
1 1 1 1 1 1 1 1
Initial value ( INIT pin input,
watchdog reset )
X X X X X X X X
Initial value
(Software reset)
R/W R/W R/W R/W R/W R/W R/W R/W Attribute
23 22 21 20 19 18 17 16 bit
CRC23 CRC22 CRC21 CRC20 CRC19 CRC18 CRC17 CRC16
1 1 1 1 1 1 1 1
Initial value ( INIT pin input,
watchdog reset )
X X X X X X X X
Initial value
(Software reset)
R R R R R R R R Attribute
15 14 13 12 11 10 9 8 bit
CRC15 CRC14 CRC13 CRC12 CRC11 CRC10 CRC9 CRC8
1 1 1 1 1 1 1 1
Initial value ( INIT pin input,
watchdog reset )
X X X X X X X X
Initial value
(Software reset)
R R R R R R R R Attribute
7 6 5 4 3 2 1 0 bit
CRC7 CRC6 CRC5 CRC4 CRC3 CRC2 CRC1 CRC0
1 1 1 1 1 1 1 1
Initial value ( INIT pin input,
watchdog reset )
X X X X X X X X
Initial value
(Software reset)
R R R R R R R R Attribute
S7-S0 Function
0xA5 -> 0x5A Start of a Flash Security Vector Re-Fetch Sequence (write only)
0xF0 -> 0X0F Start of a Flash Memory CRC32 Checksum Sequence (write only)