£
Intel Advanced+ Boot Block Flash Memory (C3)
Table 7. Command Bus Operations
First Bus Cycle
Addr
Second Bus Cycle
Command
Notes
Oper
Data
Oper
Addr
Data
Read Array
1,3
1,3
1,3
1,3
1,3
Write
Write
Write
Write
Write
X
X
X
X
X
0xFF
0x90
0x98
0x70
0x50
Read Identifier
Read
Read
Read
IA
QA
X
ID
QD
CFI Query
Read Status Register
Clear Status Register
SRD
0x40/
0x10
Program
2,3
Write
X
Write
Write
PA
BA
PD
Block Erase/Confirm
Program/Erase Suspend
Program/Erase Resume
Lock Block
1,3
1,3
1,3
1,3
1,3
1,3
1,3
Write
Write
Write
Write
Write
Write
Write
X
X
X
X
X
X
X
0x20
0xB0
0xD0
0x60
0x60
0x60
0xC0
D0H
Write
Write
Write
Write
BA
BA
BA
PA
0x01
0xD0
0x2F
PD
Unlock Block
Lock-Down Block
Protection Program
X = "Don’t Care"
PA = Prog Addr
PD = Prog Data
BA = Block Addr
IA = Identifier Addr. QA = Query Addr.
SRD = Status Reg.
Data
ID = Identifier Data QD = Query Data
NOTES:
1. Following the Read Identifier or CFI Query commands, read operations output device identification data or
CFI query information, respectively. See Section 4.1.2 and Section 4.1.3.
2. Either 0x40 or 0x10 command is valid, but the Intel standard is 0x40.
3. When writing commands, the upper data bus [DQ8-DQ15] should be either VIL or VIH, to minimize current
draw.
Bus operations are defined in Table 5, “Bus Operations” on page 17.
24
Datasheet
INTEL [ INTEL ]
