FT903L-R datasheet(41/67 Pages) BRIDGETEK

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FT900

/1/2/3 Revision C Embedded Microcontroller Datasheet

Version 1.0

Document No. BRT_000172 Clearance No.: BRT#087

5.3

AC Characteristics

AC Characteristics (Ambient Temperature = -40°C to +85°C)

System clock dynamic characteristics

Parameter

Value

Unit

Minimum

Typical

Maximum

Crystal oscillator

Clock frequency

12.00

MHz

Clock accuracy

ppm

Period jitter

120

Cycle-to-cycle

jitter

150

Long-term jitter

200

External clock input

External clock

jitter

500

Clock duty cycle

Input voltage on

pin XI/CLKIN

3.3

Table 5-8 - System clock characteristics

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 5-9 - RTC clock characteristics

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