FT931Q-R datasheet(45/65 Pages) BRIDGETEK

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FT93x Datasheet Embedded Microcontroller Datasheet

Version 1.5

Document Reference No.: BRT_000051

Clearance No.: BRT#049

RTC clock dynamic characteristics

Parameter

Value

Unit

Minimum

Typical

Maximum

Crystal oscillator

Clock frequency

32768

External clock input

External clock jitter

500

Clock duty cycle

Startup time

0.5

Input voltage on pin

RTC_XI/RTC_CLKIN

1.2

Table 5-6 RTC clock characteristics

Analog USB I/O pins dynamic characteristics

Parameter

Description

Minimum

Typical

Maximum

Units

Conditions

Driver characteristic for high speed

Thsr

High speed differential

rise time

500

Thsf

High speed differential

fall time

500

Driver characteristic for full speed

Tfr

Rise time of DP/DM

Cl=50pF

10%~90% of |Voh–Vol|

Tff

Fall time of DP/DM

Cl=50pF

10%~90% of |Voh–Vol|

Tfrma

Differential rise/fall

time matching

110

The first transition

exclude from the

idle mode

Driver characteristic for low speed

Tlr

Rise time of DP/DM

300

Cl=200pF~600pF

10%~90% of |Voh–Vol|

Tlf

Fall time of DP/DM

300

Cl=200pF~600pF

10%~90% of |Voh–Vol|

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