AT49BV040B-JU Atmel, AT49BV040B-JU Datasheet - Page 6

• Manufacturer Part Number: AT49BV040B-JU
• Description: IC FLASH 4MBIT 70NS 32PLCC
• Manufacturer: Atmel

Specifications of AT49BV040B-JU

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 4M (512K x 8)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AT49BV040B-70JU; AT49BV040B-70JU

6
Figure 4-1.
Notes:
NO
1. VA = Valid address for programming. During a sector
2. I/O7 should be rechecked even if I/O5 = “1” because
AT49BV040B
erase operation, a valid address is any sector
address within the sector being erased. During chip
erase, a valid address is any non-protected sector
address.
I/O7 may change simultaneously with I/O5.
Successful, Write
Read I/O7 - I/O0
Read I/O7 - I/O0
Program/Erase
Operation Not
Exit Command
I/O7 = Data?
Data Polling Algorithm
Product ID
I/O7 = Data?
Addr = VA
Addr = VA
I/O5 = 1?
START
NO
YES
NO
YES
YES
Program/Erase
Successful,
Read Mode
Operation
Device in
Figure 4-2.
Note:
NO
1. The system should recheck the toggle bit even if
I/O5 = “1” because the toggle bit may stop toggling
as I/O5 changes to “1”.
Successful, Write
Read I/O7 - I/O0
Read I/O7 - I/O0
Read I/O7 - I/O0
Program/Erase
Exit Command
Toggle Bit Algorithm
Operation Not
Toggle Bit =
Toggle Bit =
Product ID
I/O5 = 1?
Toggle?
Toggle?
START
Twice
YES
YES
YES
NO
NO
Successful, Device
Program/Erase
in Read Mode
Operation
3499B–FLASH–4/06