APM32F103C8T6 datasheet(44/78 Pages) GEEHY

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P a g e 43

Table34 AC Characteristics (TA=25

℃)

MODEx[1:0]

Configuration

Symbol

Parameter

Condition

Minimum

value

Maximum

value

Unit

(2MHz)

fmax(IO)out

Maximum frequency (2)

CL = 50 pF, VDD = 2~3.6V

MHz

tf(IO)out

Output fall time from high to low

level

CL = 50 pF, VDD = 2~3.6V

50(3)

tr (IO)out

Output rise time from low to high

level

50(3)

(10MHz)

fmax(IO)out

Maximum frequency (2)

CL = 50 pF, VDD = 2~3.6V

MHz

tf(IO)out

Output fall time from high to low

level

CL = 50 pF, VDD = 2~3.6V

24(3)

tr (IO)out

Output rise time from low to high

level

(50MHz)

fmax(IO)out

Maximum frequency (2)

CL = 30 pF, VDD =

2.7~3.6V

MHz

tf(IO)out

Output fall time from high to low

level

CL = 30 pF, VDD =

2.7~3.6V

6(3)

tr (IO)out

Output rise time from low to high

level

8(3)

The rate of I/O port can be configured through MODEx[1:0].

The maximum frequency is defined by the figure below.

Guaranteed by design and not tested in production.

Figure 13 I/O AC Characteristics Definition

10%

50%

90%

10%

50%

90%

tr(IO)OUT

外部输出负载

是50pF

如果(tr+tf)小于等于(2/3)T,并且占空比是（45~55%）

当负载为50pf时，达到最大的频率

Table35 Output Voltage Characteristics (test condition VCC=2.7~3.6V, TA=-40~105℃)

Symbo

Parameter

Condition

Minimum

value

Maximum

value

Unit

VOL(1)

Output low level when 8 pins absorbs

TTL port, IIO = +8mA

0.4

External output

on 50pF

Maximum frequency is achieved if (tr + tf) ≤(2/3)T and if the duty cycle

is (45~55%) when loded by 50pF

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