Datasheet

Electrical Characteristics
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor 683
Table A-18. NVM Timing Characteristics
A.3.2 NVM Reliability Parameters
The reliability of the NVM blocks is guaranteed by stress test during qualification, constant process
monitors and burn-in to screen early life failures.
The data retention and program/erase cycling failure rates are specified at the operating conditions noted.
The program/erase cycle count on the sector is incremented every time a sector or mass erase event is
executed.
The standard shipping condition for both the D-Flash and P-Flash memory is erased with security disabled.
However it is recommended that each block or sector is erased before factory programming to ensure that
the full data retention capability is achieved. Data retention time is measured from the last erase operation.
Conditions are as shown in Table A-4, with 40MHz bus and f
NVMOP
= 1MHz unless otherwise noted.
Num C Rating Symbol Min Typ Max Unit
1 D External oscillator clock f
NVMOSC
2—40
1
1
Restrictions for oscillator in crystal mode apply.
MHz
2 D Bus frequency for programming or erase operations f
NVMBUS
1 — 40 MHz
3 D Operating frequency f
NVMOP
800 — 1050 kHz
4 D P-Flash phrase programming t
bwpgm
— 171 183 µs
6 P P-Flash sector erase time t
era
—2021ms
7 P Erase All Blocks (Mass erase) time t
mass
— 101 102 ms
7a D Unsecure Flash t
uns
— 101 102 ms
8 D P-Flash erase verify (blank check) time
2
2
Valid for both “Erase verify all” or “Erase verify block” on 256K block without failing locations
t
check
— — 33500
2
t
cyc
9a D D-Flash word programming 1 word t
dpgm
— 97 104 µs
9b D D-Flash word programming 2 words t
dpgm
— 167 181 µs
9c D D-Flash word programming 3 words t
dpgm
— 237 258 µs
9d D D-Flash word programming 4 words t
dpgm
— 307 335 µs
9e D D-Flash word programming 4 words crossing row
boundary
t
dpgm
— 335 363 µs
10 D D-Flash sector erase time t
eradf
— 5.2
3
3
This is a typical value for a new device
21 ms
11 D D-Flash erase verify (blank check) time t
check
— — 17500 t
cyc