E28F008SA85 Intel, E28F008SA85 Datasheet - Page 21

• Manufacturer Part Number: E28F008SA85
• Manufacturer: Intel

Specifications of E28F008SA85

• Density: 8Mb
• Access Time (max): 85ns
• Interface Type: Parallel
• Boot Type: Not Required
• Address Bus: 20b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: TSOP
• Program/erase Volt (typ): 11.4 to 12.6V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8b
• Number Of Words: 1M
• Supply Current: 50mA
• Mounting: Surface Mount
• Pin Count: 40
• Lead Free Status / Rohs Status: Not Compliant

PRELIMINARY
FULL STATUS CHECK PROCEDURE
Write 40H (10H),
Check if Desired
WSM Ready?
Address/Data
Register Data
Byte Address
(See Above)
Read Status
Completed
Successful
Write Byte
Full Status
Byte Write
Byte Write
SR.3 = 0?
SR.4 = 0?
Start
Yes
Yes
Yes
No
No
No
V
Byte Write Error
Figure 8. Automated Byte Write Flowchart
PP
Range Error
Repeat for subsequent bytes.
Full status check can be done after each byte, or after a sequence of
bytes.
Write FFH after the last byte write operation to reset the device to read
array mode.
SR.3 must be cleared, if set during a byte write attempt, before further
attempts are allowed by the Write State Machine.
SR.4 is only cleared by the clear status register command in cases
where multiple bytes are written before full status is checked.
If an error is detected, clear the status register before attempting retry
or other error recovery.
Optional Read
Standby/Read
Operation
Operation
Standby
Standby
Write
Write
Bus
Bus
Command
Command
Byte Write
Byte Write
Setup
Data = 40H (10H)
Addr = Byte to Be Written
Addr = Byte to Be Written
Check RY/BY#
(V
Read Status Register
(Check SR.7
1 = Ready, 0 = Busy
Toggle OE# or CE# to Update
Status Register)
CPU may already have read status
register data in WSM Ready polling
above
Check SR.3
1 = V
Check SR.4
1 = Byte Write Error
Data to Be Wriiten
or
OH
= Ready, V
PP
Low Detect
Comments
Comments
OL
= Busy)
28F008SA
0429_06
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