STM8S207MB datasheet(69/103 Pages) STMICROELECTRONICS

69 / 103 page

STM8S207xx, STM8S208xx

Electrical characteristics

Doc ID 14733 Rev 9

69/103

10.3.5

Memory characteristics

RAM and hardware registers

Flash program memory/data EEPROM memory

General conditions: TA = -40 to 125 °C.

Table 35.

RAM and hardware registers

Symbol

Parameter

Conditions

Min

Unit

VRM

Data retention mode(1)

Minimum supply voltage without losing data stored in RAM (in halt mode or under reset) or in hardware

registers (only in halt mode). Guaranteed by design, not tested in production.

Halt mode (or reset)

VIT-max

(2)

Refer to Table 19 on page 57 for the value of VIT-max.

Table 36.

Flash program memory/data EEPROM memory

Symbol

Parameter

Conditions

Min(1)

Data based on characterization results, not tested in production.

Typ

Max

Unit

VDD

Operating voltage

(all modes, execution/write/erase)

fCPU ≤ 24 MHz

2.95

5.5

tprog

Standard programming time

(including erase) for byte/word/block

(1 byte/4 bytes/128 bytes)

66.6

Fast programming time for 1 block

(128 bytes)

33.3

terase

Erase time for 1 block (128 bytes)

3.3

NRW

Erase/write cycles(2)

(program memory)

The physical granularity of the memory is 4 bytes, so cycling is performed on 4 bytes even when a

write/erase operation addresses a single byte.

TA = 85 °C

10 k

cycles

Erase/write cycles (data memory)(2)

TA = 125 ° C

300 k

tRET

Data retention (program memory)

after 10 k erase/write cycles at

TA = 85 °C

TRET = 55° C

years

Data retention (data memory) after 10

k erase/write cycles at TA = 85 °C

TRET = 55° C

Data retention (data memory) after

300k erase/write cycles at

TA = 125 °C

TRET = 85° C

IDD

Supply current (Flash programming or

erasing for 1 to 128 bytes)

2mA

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