XM33C321ASPZR datasheet(41/113 Pages) TI2

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7.6 Flash Memory Characteristics

over operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Supply

VDDPGM/ERASE

Program and erase supply voltage

1.71

3.6

IDDERASE

Supply current from VDD during erase

operation

Supply current delta

IDDPGM

Supply current from VDD during

program operation

Supply current delta

Endurance

NWEC(CODEFLASH)

Erase/program cycle endurance (code

flash)

k cycles

NWEC(DATAFLASH)

Erase/program cycle endurance (data

flash)

100

k cycles

NE(MAX)

Total erase operations before failure (1)

802

k erase operations

NW(MAX)

Write operations per word line before

sector erase (2)

write operations

Retention

tRET_85

Flash memory data retention

-40°C <= Tj <= 85°C

years

tRET_105

Flash memory data retention

-40°C <= Tj <= 105°C

11.4

years

tRET_130

Flash memory data retention

-40°C <= Tj <= 130°C

2.4

years

Program and Erase Timing

tPROG (WORD, 128)

Program time for flash word (3) (5)

µs

tPROG (SEC, 128)

Program time for 2kB sector (4) (5)

5.1

tERASE (SEC)

Sector erase time

<10k erase/program cycles

tERASE (BANK)

Bank erase time

<10k erase/program cycles

(1)

Total number of cumulative erase operations supported by the flash before failure. A sector erase or bank erase operation is

considered to be one erase operation.

(2)

Maximum number of write operations allowed per word line (256 bytes) before the word line must be erased. If additional writes to the

same word line are required, a sector erase is required once the maximum number of write operations per word line is reached.

(3)

Program time is defined as the time from when the program command is triggered until the command completion interrupt flag is set in

the flash controller.

(4)

Sector program time is defined as the time from when the first word program command is triggered until the final word program

command completes and the interrupt flag is set in the flash controller. This time includes the time needed for software to load each

flash word (after the first flash word) into the flash controller during programming of the sector.

(5)

Flash word size is 128 data bits (16 bytes). On devices with ECC, the total flash word size is 144 bits (128 data bits plus 16 ECC bits).

7.7 Power Supply Sequencing

7.7.1 Power Supply Ramp

Figure 7-1 shows the relationships of POR-, POR+, BOR0-, and BOR0+ during powerup and powerdown.

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