ST7LITEUSX datasheet(71/108 Pages) STMICROELECTRONICS

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ST7LITEUSx

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OPERATING CONDITIONS (Cont’d)

12.3.4 Voltage drop between AVD flag set and LVD reset generation

Note:

1. Not tested in production, guaranteed by characterization.

12.3.5 Internal RC oscillator

12.3.5.1 Internal RC oscillator calibrated at 5.0V

The ST7 internal clock can be supplied by an internal RC oscillator (selectable by option byte).

Notes:

1. See “INTERNAL RC OSCILLATOR ADJUSTMENT” on page 17

2. Guaranteed by Design.

To improve clock stability and frequency accuracy, it is recommended to place a decoupling capacitor, typically 100nF,

between the VDD and VSS pins as close as possible to the ST7 device

Parameter

Min 1)

Typ 1)

Max 1)

Unit

AVD med. Threshold - AVD low. threshold

700

950

1200

AVD high. Threshold - AVD low threshold

900

1150

1400

AVD high. Threshold - AVD med. threshold

100

200

300

AVD low Threshold - LVD low threshold

100

300

AVD med. Threshold - LVD low threshold

800

1000

1300

AVD med. Threshold - LVD med. threshold

200

300

AVD high. Threshold - LVD low threshold

850

1250

1700

AVD high. Threshold - LVD med. threshold

200

400

600

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fRC

Internal RC oscillator frequency

RCCR = FF (reset value),

TA=25°C,VDD=5V

4.5

MHz

RCCR = RCCR01),TA=25°C,VDD=5V

ACCRC

Accuracy of Internal RC oscillator

with

RCCR=RCCR01)

TA=25°C, VDD=5V

-2

TA=25°C, VDD=4.5 to 5.5V

-3

TA=0 to +85°C, VDD=5V

-3.5

+4.5

TA=0 to +85°C, VDD=4.5 to 5.5V

-4

TA=0 to +125°C, VDD=5V

-3.5

TA=0 to +125°C, VDD=4.5 to 5.5V

-5

TA=-40°C to 0°C, VDD=4.5 to 5.5V

-6

IDD(RC)

RC oscillator current consumption TA=25°C, VDD=5V

900 2)

µA

tsu(RC)

RC oscillator setup time

TA=25°C, VDD=5V

4 2)

µs

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