w49v002fa Winbond Electronics Corp America, w49v002fa Datasheet - Page 27

• Manufacturer Part Number: w49v002fa
• Description: 256k X 8 Cmos Flash Memory With Fwh Interface
• Manufacturer: Winbond Electronics Corp America

Timing Waveforms for FWH Interface Mode, continued
Chip Erase Timing Diagram
FWH[3:0]
#RESET
FWH4
CLK
#RESET
FWH[3:0]
FWH[3:0]
FWH4
#RESET
FWH4
#RESET
FWH[3:0]
FWH[3:0]
#RESET
#RESET
FWH4
FWH[3:0]
FWH4
CLK
FWH4
CLK
CLK
CLK
CLK
1 Clock
1 Clock
1 Clock
1 Clock
1 Clock
3th Start
5th Start
1 Clock
2th Start
4th Start
6th Start
1st Start
1110b
1110b
1110b
1110b
1110b
1110b
1 Clock
1 Clock
1 Clock
1 Clock
1 Clock
1 Clock
0000b
0000b
0000b
0000b
IDSEL
0000b
IDSEL
0000b
IDSEL
IDSEL
IDSEL
IDSEL
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
Load Address "5555" in 7 Clocks
Load Address "2AAA" in 7 Clocks
Write the 3rd command to the device in FWH mode.
Write the 5th command to the device in FWH mode.
Load Address "2AAA" in 7 Clocks
Load Address "5555" in 7 Clocks
Write the 2nd command to the device in FWH mode.
Write the 4th command to the device in FWH mode.
Load Address "5555" in 7 Clocks
Write the 6th command to the device in FWH mode.
Load Address "5555" in 7 Clocks
Write the 1st command to the device in FWH mode.
Address
X101b
X010b
Address
X010b
Address
Address
Address
X101b
X101b
X101b
Address
1010b
0101b
1010b
0101b
0101b
0101b
1010b
1010b
0101b
0101b
0101b
0101b
- 27 -
1010b
1010b
0101b
0101b
0101b
0101b
M Size
0000b
0000b
M Size
M Size
M Size
M Size
0000b
0000b
0000b
M Size
0000b
Load Data "80"
Load Data "55"
0000b
Load Data "55"
in 2 Clocks
Load Data "AA"
in 2 Clocks
Load Data "10"
Load Data "AA"
in 2 Clocks
in 2 Clocks
0101b
in 2 Clocks
0000b
in 2 Clocks
0101b
1010b
1010b
Data
Data
Publication Release Date: February 19, 2002
Data
Data
Data
Data
1000b
0101b
0001b
0101b
1010b
1010b
1111b
1111b
1111b
1111b
1111b
1111b
2 Clocks
2 Clocks
2 Clocks
2 Clocks
2 Clocks
2 Clocks
TAR
TAR
TAR
TAR
TAR
TAR
Tri-State
Tri-State
Tri-State
Tri-State
Tri-State
Tri-State
1 Clock
1 Clock
1 Clock
1 Clock
1 Clock
0000b
0000b
1 Clock
0000b
0000b
Sync
Sync
0000b
0000b
Sync
Sync
Sync
Sync
1111b
1111b Tri-State
1111b
1111b
1111b
1111b
2 Clocks
2 Clocks
2 Clocks
2 Clocks
2 Clocks
W49V002FA
2 Clocks
TAR
TAR
TAR
TAR
TAR
TAR
Tri-State
Tri-State
Tri-State
Tri-State
Tri-State
Internal
erase start
Internal
erase start
Start next
command
Start next
command
Start next
command
Start next
command
1 Clock
1 Clock
1 Clock
1 Clock
Start next
command
1 Clock
Revision A2