M28W640HCT70N6E NUMONYX, M28W640HCT70N6E Datasheet - Page 66

• Manufacturer Part Number: M28W640HCT70N6E
• Description: TSOP-1 48 12X20 CUSTD FLASH
• Manufacturer: NUMONYX

Flowcharts and pseudocodes
Figure 22. Protection Register Program flowchart and pseudocode
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 controller operations.
66/72
after a sequence.
Write Address
Read Status
Write C0h
Register
& Data
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 or
protection_register_program_command (addressToProgram, dataToProgram) {:
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 */
}
do {
error_handler ( ) ;
error_handler ( ) ;
error_handler ( ) ;
writeToFlash (addressToProgram, dataToProgram) ;
/*Memory enters read status state after
the Program Command*/
} while (status_register.b7== 0) ;
writeToFlash (any_address, 0xC0) ;
status_register=readFlash (any_address) ;
/* E or G must be toggled*/
M28W640HCT, M28W640HCB
AI04381