w49v002fa Winbond Electronics Corp America, w49v002fa Datasheet - Page 24

• 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
#DATA Polling Timing Diagram
FWH[3:0]
FWH[3:0]
#RESET
FWH[3:0]
#RESET
#RESET
FWH4
FWH4
FWH4
CLK
CLK
CLK
1 Clock
1 Clock
1 Clock
Start
1110b
1101b
1101b
Start
Start
1 Clock
1 Clock
1 Clock
IDSEL
IDSEL
IDSEL
0000b
0000b
0000b
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
XXXXb
Write the last command(program or erase) to the device in FWH mode.
XXA[17:16]b
XXA[17:16]b
XXA[17:16]b
Load Address "An" in 7 Clocks
Read the DQ7 to see if the internal write complete or not.
Load Address in 7 Clocks
Load Address in 7 Clocks
When internal write complete, the DQ7 will equal to Dn7.
An[15:12]
An[15:12]
An[15:12]
Address
Address
Address
An[11:8]
An[11:8]
An[11:8]
XXXXb
- 24 -
An[7:4]
An[7:4]
An[7:4]
An[3:0]
An[3:0]
An[3:0]
M Size
0000b
M Size
M Size
0000b
0000b
Load Data "Dn"
Dn[3:0]
in 2 Clocks
1111b
1111b
2 Clocks
2 Clocks
Data
TAR
TAR
Dn[7:4]
Tri-State
Tri-State
1 Clock
1 Clock
1111b
0000b
0000b
Sync
Sync
2 Clocks
TAR
Tri-State
Data out 2 Clocks
Data out 2 Clocks
XXXXb
XXXXb
W49V002FA
Data
Data
1 Clock
Dn7,xxx
Dn7,xxx
0000b
Sync
1111b
1111b
1111b
2 Clocks
2 Clocks
2 Clocks
TAR
TAR
TAR
Tri-State
Tri-State
Tri-State
1 Clock
1 Clock
1 Clock
Next Start
Next Start
Next Start