w49v002fa Winbond Electronics Corp America, w49v002fa Datasheet - Page 23

• 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
Program Cycle Timing Diagram
FWH[3:0 ]
#RESET
FWH4
CLK
FWH[3:0 ]
FWH[3:0 ]
#RESET
#RESET
FWH[3:0 ]
#RESET
FWH4
FWH4
FWH4
CLK
CLK
CLK
1 Clock
1 Clock
1 Clock
4th Start
3rd Start
1 Clock
2nd Start
1110b
1st Start
1110b
1110b
1110b
1 Clock
1 Clock
1 Clock
0000b
0000b
IDSEL
1 Clock
0000b
IDSEL
IDSEL
0000b
IDSEL
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
Write the 4th command(target location to be programmed) to the device in FWH mode.
XXA[17:16]b
XXXXb
XXXXb
XXXXb
Load Ain in 7 Clocks
Load Address "5555" in 7 Clocks
Write the 3rd command to the device in FWH mode.
Load Address "2AAA" in 7 Clocks
Write the 2nd command to the device in FWH mode.
Load Address "5555" in 7 Clocks
Write the 1st command to the device in FWH mode.
Address
A[15:12]
X101b
X010b
Address
Address
X101b
Address
A[11:8]
0101b
1010b
0101b
1010b
A[7:4]
0101b
0101b
- 23 -
0101b
A[3:0]
1010b
0101b
M Size
0000b
M Size
0000b
M Size
0000b
M Size
0000b
Publication Release Date: February 19, 2002
Load Data "AA" in 2 Clocks
Load Din in 2 Clocks
D[3:0]
0000b
Load Data "55"
Load Data "A0"
0101b
in 2 Clocks
in 2 Clocks
1010b
Data
Data
Data
Data
D[7:4]
1010b
0101b
1010b
1111b
1111b
1111b
1111b
2 Clocks
2 Clocks
2 Clocks
TAR
2 Clocks
TAR
TAR
TAR
Tri-State
Tri-State
Tri-State
Tri-State
W49V002FA
1 Clock
1 Clock
1 Clock
0000b
0000b
1 Clock
Sync
0000b
Sync
0000b
Sync
Sync
1111b Tri-State
1111b
1111b
1111b
2 Clocks
2 Clocks
2 Clocks
TAR
2 Clocks
TAR
TAR
TAR
Revision A2
Tri-State
Tri-State
Tri-State
Internal
program start
Internal
program start
Start next
command
Start next
command
1 Clock
Start next
command
1 Clock
1 Clock