SPC56EL54X datasheet(126/165 Pages) STMICROELECTRONICS

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Electrical characteristics

SPC56ELx, SPC564Lx

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2. Initial Max program and erase times provide guidance for time-out limits used in the factory and apply for <100

program/erase cycles, nominal supply values and operation at 25°C. These values are verified at production test.

3. Lifetime Max program and erase times apply across the voltage, temperature, and cycling range of product life. These

values are characterized, but not tested.

4. Program times are actual hardware programming times and do not include software overhead.

Table 29. Flash memory timing

Symbol

Parameter

Value

Unit

Min

Typ

Max

TRES

Time from clearing the MCR-ESUS or PSUS bit with EHV = 1

until DONE goes low

——

100

TDONE

Time from 0 to 1 transition on the MCR-EHV bit initiating a

program/erase until the MCR-DONE bit is cleared

——

TPSRT

Time between program suspend resume and the next program

suspend request.(1)

100

—

µs

TESRT

Time between erase suspend resume and the next erase

suspend request.(2)

1. Repeated suspends at a high frequency may result in the operation timing out, and the flash module will respond by

completing the operation with a fail code (MCR[PEG] = 0), or the operation not able to finish (MCR[DONE] = 1 during

Program operation). The minimum time between suspends to ensure this does not occur is TPSRT.

2. If Erase suspend rate is less than TESRT, an increase of slope voltage ramp occurs during erase pulse. This improves erase

time but reduces cycling figure due to overstress.

Table 30. Flash memory module life

No.

Symbol

Parameter

Value

Unit

Minimum

Typical Maximum

1P/E

Number of program/erase cycles per block for 16 KB,

48 KB, and 64 KB blocks over the operating

temperature range(1)

100000

—

cycles

2P/E

Number of program/erase cycles per block for 128 KB

and 256 KB blocks over the operating temperature

range(1)

1000

100000

(2)

—

cycles

Retenti

Minimum data retention at 85 °C average ambient

temperature(3)

Blocks with 0–1,000 P/E cycles

Blocks with 1,001–10,000 P/E cycles

Blocks with 10,001–100,000 P/E cycles

—

years

1. Operating temperature range is TJ from –40 °C to 150 °C. Typical endurance is evaluated at 25 C.

2. Typical P/E cycles is 100,000 cycles for 128 KB and 256 KB blocks.

3. Ambient temperature averaged over duration of application, not to exceed product operating temperature range.

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