W49V002FA Datasheet, PDF (27/32 Pages) Winbond – 256K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE

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