ST7263BEx datasheet(144/186 Pages) STMICROELECTRONICS

Part #	ST7263BEx

Description	Low speed USB 8-bit MCU family with up to 32 KB Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI and I²C

PDF	186 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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144 / 186 page

Electrical characteristics

ST7263Bxx

144/186

Doc ID 7516 Rev 8

Figure 57.

Typical application with an external clock source

tWDG

Watchdog timeout

fCPU = 8MHz

49152

3145728

tCPU

6.144

393.216

tOXOV

Crystal oscillator startup time

20(1)

40(1)

tDDR

Power up rise time

from VDD = 0 to 4 V

100(1)

Not tested in production, guaranteed by characterization.

Table 62.

Control timing characteristics

Table 63.

External clock source

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VOSCINH OSCIN input pin high level voltage

see Figure 57

0.7xVDD

-VDD

VOSCINL OSCIN input pin low level voltage

VSS

-0.3xVDD

tw(OSCINH)

tw(OSCINL)

OSCIN high or low time(1)

tr(OSCIN)

tf(OSCIN)

OSCIN rise or fall time(1)

OSCx input leakage current

VSS≤VIN≤VDD

±1

μA

Data based on design simulation and/or technology characteristics, not tested in production.

OSCIN

OSCOUT

fOSC

EXTERNAL

ST72XXX

CLOCK SOURCE

Not connected internally

VOSCINL

VOSCINH

tr(OSCIN)

tf(OSCIN)

tw(OSCINH)

tw(OSCINL)

90%

10%

ST7263BEx Datasheet(PDF) 144 Page - STMicroelectronics

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