NXP Semiconductors K22F series - Page 669

Restore Erase Algo
Clear SUSPACK = 0
ERSSCR Command
(Write FCCOB)
Launch/Resume Command
(Clear CCIF)
CCIF = 1?
Request Suspend
(Set ERSSUSP)
Interrupt?
CCIF = 1?
Service Interrupt
(Read Flash)
ERSSUSP=0?
Next Command
(Write FCCOB)
Clear ERSSUSP
Enter with CCIF = 1
Resume
ERSSCR
No
Memory Controller
Command Processing
SUSPACK=1
Clear ERSSUSP
Execute
Yes
DONE?
No
ERSSUSP=1?
Save Erase Algo
Set CCIF
No
Yes
Start
New
Resume Erase?
No, Abort
User Cmd Interrupt/Suspend
Set SUSPACK = 1
ERSSCR Suspended
Command Initiation
Yes
No
Yes
Yes
ERSSCR
Completed
ERSSCR Suspended
ERSSUSP=1
ERSSUSP: Bit in FCNFG register
SUSPACK: Internal Suspend Acknowledge
No
Yes
Yes
No
Yes
No
ERSSCR Completed
ERSSUSP=0
Figure 29-6. Suspend and Resume of Erase Flash Sector Operation
Chapter 29 Flash Memory Module (FTFA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 669