S29AL004D90TFI020 Spansion Inc., S29AL004D90TFI020 Datasheet - Page 32
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S29AL004D90TFI020
Manufacturer Part Number
S29AL004D90TFI020
Description
Flash Memory IC
Manufacturer
Spansion Inc.
Specifications of S29AL004D90TFI020
Memory Size
4Mbit
Memory Configuration
512K X 8 / 256K X 16
Ic Interface Type
Parallel
Access Time
90ns
Memory Case Style
TSOP
No. Of Pins
48
Operating Temperature Range
-40°C To +85°C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
S29AL004D90TFI020
Manufacturer:
SPANSION
Quantity:
4 300
Part Number:
S29AL004D90TFI020H
Manufacturer:
SPANSION
Quantity:
20 000
30
sector erase commands is always less than 50 µs. See also the
Command Sequence‚ on page
After the sector erase command sequence is written, the system should read the
status on DQ7 (Data# Polling) or DQ6 (Toggle Bit I) to ensure the device has ac-
cepted the command sequence, and then read DQ3. If DQ3 is 1, the internally
controlled erase cycle has begun; all further commands (other than Erase Sus-
pend) are ignored until the erase operation is complete. If DQ3 is 0, the device
(Note 1)
Notes:
1. Read toggle bit twice to determine whether or not it
2. Recheck toggle bit because it may stop toggling as
is toggling. See text.
DQ5 changes to 1. See text.
No
Figure 6. Toggle Bit Algorithm
Reset Command
Complete, Write
Read DQ7–DQ0
Read DQ7–DQ0
Read DQ7–DQ0
Program/Erase
A d v a n c e
Operation Not
Toggle Bit
Toggle Bit
= Toggle?
DQ5 = 1?
= Toggle?
22.
START
Twice
S29AL004D
Yes
Yes
Yes
(Notes
1, 2)
I n f o r m a t i o n
Operation Complete
No
No
Program/Erase
Sector Erase
S29AL004D_00_A1 February 18, 2005