M28W640FCB70N6F NUMONYX, M28W640FCB70N6F Datasheet - Page 68
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M28W640FCB70N6F
Manufacturer Part Number
M28W640FCB70N6F
Description
IC FLASH 64MBIT 70NS 48TSOP
Manufacturer
NUMONYX
Datasheet
1.M28W640FCB70ZB6F.pdf
(77 pages)
Specifications of M28W640FCB70N6F
Format - Memory
FLASH
Memory Type
FLASH - Nor
Memory Size
64M (4M x 16)
Speed
70ns
Interface
Parallel
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
48-TSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Flowcharts and pseudo codes
Figure 20. Erase flowchart and pseudo code
1. If an error is found, the Status Register must be cleared before further Program/Erase operations.
68/77
Address & D0h
Read Status
Write Block
b4, b5 = 1
Write 20h
Register
b7 = 1
b3 = 0
b5 = 0
b1 = 0
Start
End
YES
YES
NO
YES
YES
NO
NO
YES
NO
NO
Sequence Error (1)
Erase to Protected
Erase Error (1)
Block Error (1)
V PP Invalid
Command
Error (1)
if ( (status_register.b5==1) )
/* erase error */
erase_command ( blockToErase ) {
if (status_register.b3==1) /*VPP invalid error */
if ( (status_register.b4==1) && (status_register.b5==1) )
/* command sequence error */
if (status_register.b1==1) /*program to protect block error */
}
do {
error_handler ( ) ;
error_handler ( ) ;
error_handler ( ) ;
error_handler ( ) ;
writeToFlash (any_address, 0x20) ;
writeToFlash (blockToErase, 0xD0) ;
/* only A12-A20 are significannt */
/* Memory enters read status state after
the Erase Command */
} while (status_register.b7== 0) ;
status_register=readFlash (any_address) ;
/* E or G must be toggled*/
M28W640FCT, M28W640FCB
AI03541b