Analog Devices ADSP-BF506F Hardware Reference Manual page 160

Command Interface to Internal Flash Memory
Two bus write cycles are required to issue the block lock-down command:
• The first bus cycle sets up the block lock command.
• The second bus write cycle latches the block address.
The lock status can be monitored for each block using the read electronic
signature command. Locked-down blocks revert to the locked (and not
locked-down) state when the device is reset on power-down.
on page 6-41 shows the lock status after issuing a block lock-down com-
mand. Refer to
and Figure 6-9 on page 6-64
and pseudo code for using the lock-down command.
Table 6-5. Standard Commands
Commands
Read Array
Read Status Register
Read Electronic Signature
Read CFI Query
Clear Status Register
Block Erase
Program
Program/Erase Suspend
Program/Erase Resume
Protection Register Program 2
Set Configuration Register
6-16
"Block Locking" on page 6-38
and Listing 6-5 on page 6-64
Cycles
Bus Operations
1st Cycle
Op.
1+ Write
1+ Write
1+ Write
1+ Write
1 Write
2 Write
2 Write
1 Write
1 Write
Write
2 Write
ADSP-BF50x Blackfin Processor Hardware Reference
for a detailed explanation,
1
2nd Cycle
Add Data Op.
BKA 0xFF Read
BKA 0x70 Read
BKA 0x90 Read
BKA 0x98 Read
X 0x50
BKA or 0x20 Write
3
BA
BKA or 0x40or Write
3 0x10
WA
X 0xB0
X 0xD0
PRA 0xC0 Write
CRD 0x60 Write
Table 6-15
for a flowchart
Add Data
WA RD
2 SRD
BKA
2 ESD
BKA
2 QD
BKA
BA 0xD0
WA PD
PRA PRD
CRD 0x03