m28w640fc Numonyx, m28w640fc Datasheet - Page 65

• Manufacturer Part Number: m28w640fc
• Description: 64 Mbit 4mbx16, Boot Block 3v Supply Flash Memory
• Manufacturer: Numonyx

M28W640FCT, M28W640FCB
Figure 17. Double Word Program flowchart and pseudo code
1. Status check of b1 (Protected Block), b3 (V
2. If an error is found, the Status Register must be cleared before further Program/Erase operations.
3. Address 1 and Address 2 must be consecutive addresses differing only for bit A0.
or after a sequence.
Write Address 1
Write Address 2
Read Status
& Data 1 (3)
& Data 2 (3)
Write 30h
Register
b7 = 1
b3 = 0
b4 = 0
b1 = 0
Start
End
YES
YES
YES
YES
NO
NO
NO
NO
Program to Protected
Block Error (1, 2)
V PP Invalid
Error (1, 2)
Error (1, 2)
Program
PP
Invalid) and b4 (Program Error) can be made after each program operation
double_word_program_command (addressToProgram1, dataToProgram1,
{
if (status_register.b3==1) /*VPP invalid error */
if (status_register.b4==1) /*program error */
if (status_register.b1==1) /*program to protect block error */
}
error_handler ( ) ;
error_handler ( ) ;
error_handler ( ) ;
do {
} while (status_register.b7== 0) ;
writeToFlash (any_address, 0x30) ;
writeToFlash (addressToProgram1, dataToProgram1) ;
writeToFlash (addressToProgram2, dataToProgram2) ;
the Program command*/
status_register=readFlash (any_address) ;
/* E or G must be toggled*/
/*Memory enters read status state after
addressToProgram2, dataToProgram2)
Flowcharts and pseudo codes
/*see note (3) */
/*see note (3) */
AI03539b
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