W39V040FAP Winbond Electronics, W39V040FAP Datasheet - Page 27

• Manufacturer Part Number: W39V040FAP
• Manufacturer: Winbond Electronics

Specifications of W39V040FAP

• Density: 4Mb
• Access Time (max): 150ns
• Interface Type: Parallel/Serial
• Boot Type: Top
• Address Bus: 4/11Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: 0C to 70C
• Package Type: PLCC
• Program/erase Volt (typ): 3.3V
• Sync/async: Async/Sync
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8b
• Number Of Words: 512K
• Supply Current: 20mA
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

11. TIMING WAVEFORMS FOR FWH INTERFACE MODE
11.1 Read Cycle Timing Diagram
11.2 Write Cycle Timing Diagram
#RESET
FWH[3:0]
FWH[3:0]
#RESET
FWH4
FWH4
CLK
Note: When A22 = high, the host will read the BIOS code from the FWH d
CLK
While A22 = low, the host will read the GPI (Add = FFBC0100
Product ID (Add = FFBC0000/FFBC0001) from the FWH dev
1 Clock
1 Clock
T
SU
1101b
Start
FWH
Read
1110b
Start
FWH
Write
T
HD
1 Clock
1 Clock
0000b
0000b
IDSEL
IDSEL
XXXXb
XXXXb
XA[22]XXb XXA[18:16]
XXXXb
Load Address in 7
Clocks
Load Address in 7 Clocks
XXA[18:16]b
T
T CYC
CYC
A[15:12]
A[15:12]
Address
Address
A[11:8]
A[11:8]
T
A[7:4]
A[7:4]
SU
- 27 -
T
HD
A[3:0]
A[3:0]
0000b
0000
b]
M Size
M Size
Load Data in 2 Clocks
D[3:0]
1111b
Publication Release Date: April 14, 2005
2 Clocks
Data
TAR
T SU
Tri-State
D[7:4]
T HD
1 Clock
1111b
0000b
Sync
2 Clocks
T
TAR
KQ
Tri-State
Data out 2 Clocks
D[3:0]
W39V040FA
Data
1 Clock
0000b
D[7:4]
Sync
1111b
1111b
2 Clocks
2 Clocks
TAR
TAR
Tri-State
Revision A6
Tri-State
Next Start
1 Clock
Next Start
0000b
1 Clock
0000b