AM29F004B AMD [Advanced Micro Devices], AM29F004B Datasheet - Page 29

• Manufacturer Part Number: AM29F004B
• Description: 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

Note: The system may use CE# or OE# to toggle DQ2 and DQ6. DQ2 toggles only when read at an address within an erase-suspended sector.
AC CHARACTERISTICS
Note: VA = Valid address. Illustration shows first status cycle after command sequence, last status read cycle, and array data read cycle.
Note: VA = Valid address; not required for DQ6. Illustration shows first two status cycle after command sequence, last status read cycle, and
array data read cycle.
8/5/05
Addresses
WE#
Addresses
DQ6
DQ2
DQ6/DQ2
DQ0–DQ6
WE#
WE#
DQ7
OE#
CE#
OE#
CE#
Embedded
Erasing
Enter
t
t
CH
CH
t
t
Erase
OEH
OEH
Figure 13. Data# Polling Timings (During Embedded Algorithms)
Figure 14. Toggle Bit Timings (During Embedded Algorithms)
High Z
Suspend
Erase
t
t
ACC
ACC
t
t
CE
CE
A D V A N C E
t
VA
t
t
VA
t
RC
OE
Erase Suspend
RC
OE
Read
Complement
Valid Status
Status Data
(first read)
Suspend Program
t
Figure 15. DQ2 vs. DQ6
t
OH
OH
t
t
DF
Enter Erase
DF
Am29F004B
I N F O R M A T I O N
(second read)
Suspend
Program
Valid Status
Erase
VA
VA
Complement
Status Data
Erase Suspend
Read
True
True
(stops toggling)
Valid Status
Resume
VA
Erase
Erase
VA
Valid Data
Valid Data
Valid Data
VA
Complete
Erase
High Z
High Z
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