ST92F124 datasheet(385/429 Pages) STMICROELECTRONICS

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ST92F124/F150/F250 - ELECTRICAL CHARACTERISTICS

RCCU CHARACTERISTICS

(VDD = 5V ± 10%, TA = –40°C to +125°C, CLoad = 50pF, fINTCLK = 24MHz, unless otherwise specified)

Note:

(1) Unless otherwise stated, typical data are based on TA= 25°C and VDD= 5V. They are only reported for design guide lines not tested in

production.

(2) Value guaranteed by design.

RCCU TIMING TABLE

(VDD = 5V ± 10%, TA = –40°C to +125°C, fINTCLK = 24 MHz, unless otherwise specified)

Note:

(1) Unless otherwise stated, typical data are based on TA= 25°C and VDD= 5V. They are only reported for design guide lines not tested in

production.

(2) To be valid, a RESET pulse must exceed tNFR. All reset glitches with a duration shorter than tFRS will be filtered

(3) Depending on the delay between rising edge of RESET pin and the first rising edge of CLOCK1, the value can differ from the typical value

for +/- 1 CLOCK1 cycle.

Legend: Tosc = Crystal Oscilllator Clock (CLOCK1) period.

BOOTROM TIMING TABLE

Note:

(1) Unless otherwise stated, typical data are based on TA= 25°C and VDD= 5V. They are only reported for design guide lines not tested in

production

(2) Refer to AN1528 for more details on BOOTROM code.

Symbol

Parameter

Comment

Value

Unit

Min

Typ (1)

Max

VIHRS

RESET Input High Level

Input Threshold

0.75 x VDD

VILRS

RESET Input Low Level

Input Threshold

0.25 x VDD

VIRS

Input Voltage Range

– 0.3

VDD + 0.3

VHYRS

RESET Input Hysteresis

1 (2)

ILKRS

RESET Pin Input Leakage

0V < VIN < VDD

– 1

µA

Symbol

Parameter

Comment

Value

Unit

Min

Typ (1)

Max

tFRS

RESET Input Filtered Pulse(2)

tNFR

RESET Input Non Filtered

Pulse(2)

µs

tRSPH

(3)

RESET Phase duration

20400

Tosc

tSTR

STOP Restart duration

DIV2 = 0

DIV2 = 1

10200

20400

Tosc

Symbol

Parameter

Conditions

Typ Value (1)

Unit

tBRE

BOOTROM Execution Duration

(see Figure 65 on page 137) (2)

fOSC = 4MHz

ST92F124 Datasheet(PDF) 385 Page - STMicroelectronics

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