K20P121M100SF2 Datasheet, PDF (31/68 Pages) Freescale Semiconductor, Inc – Up to 100 MHz ARM Cortex-M4 core with DSP instructions delivering 1.25 Dhrystone MIPS per MHz

Peripheral operating requirements and behaviors
Table 19. Flash command timing specifications (continued)
Symbol Description
t_ersall Erase All Blocks execution time
t_vfykey Verify Backdoor Access Key execution time
Program Partition for EEPROM execution time
t_pgmpart256k
• 256 KB FlexNVM
Min.
—
—
—
Typ.
320
—
175
Max.
1600
35
TBD
Unit
Notes
ms
2
μs
1
ms
Set FlexRAM Function execution time:
t_setram32k
t_setram256k
• 32 KB EEPROM backup
• 256 KB EEPROM backup
—
TBD
TBD
ms
—
TBD
TBD
ms
Byte-write to FlexRAM for EEPROM operation
t_eewr8bers Byte-write to erased FlexRAM location execution
—
100
TBD
μs
3
time
Byte-write to FlexRAM execution time:
t_eewr8b32k
t_eewr8b64k
t_eewr8b128k
t_eewr8b256k
• 32 KB EEPROM backup
• 64 KB EEPROM backup
• 128 KB EEPROM backup
• 256 KB EEPROM backup
—
TBD
TBD
ms
—
TBD
1.5
ms
—
TBD
TBD
ms
—
TBD
2.5
ms
Word-write to FlexRAM for EEPROM operation
t_eewr16bers Word-write to erased FlexRAM location
execution time
—
100
TBD
μs
Word-write to FlexRAM execution time:
t_eewr16b32k
t_eewr16b64k
t_eewr16b128k
t_eewr16b256k
• 32 KB EEPROM backup
• 64 KB EEPROM backup
• 128 KB EEPROM backup
• 256 KB EEPROM backup
—
TBD
TBD
ms
—
TBD
1.5
ms
—
TBD
TBD
ms
—
TBD
2.5
ms
Longword-write to FlexRAM for EEPROM operation
t_eewr32bers Longword-write to erased FlexRAM location
execution time
—
200
TBD
μs
Longword-write to FlexRAM execution time:
t_eewr32b32k
t_eewr32b64k
t_eewr32b128k
t_eewr32b256k
• 32 KB EEPROM backup
• 64 KB EEPROM backup
• 128 KB EEPROM backup
• 256 KB EEPROM backup
—
TBD
TBD
ms
—
TBD
2.7
ms
—
TBD
TBD
ms
—
TBD
3.7
ms
1. Assumes 25MHz flash clock frequency.
2. Maximum times for erase parameters based on expectations at cycling end-of-life.
3. For byte-writes to an erased FlexRAM location, the aligned word containing the byte must be erased.
K20 Sub-Family Data Sheet Data Sheet, Rev. 4, 3/2011.
Freescale Semiconductor, Inc.
Preliminary
31