FT51CS-R datasheet(24/43 Pages) FTDI

部件名	FT51CS-R

功能描述	Supports DMA operation

PDF	43 Pages

Scroll/Zoom	100%

制造商	FTDI [Future Technology Devices International Ltd.]

网页	http://www.ftdichip.com

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24 / 43 page

FT51A Advanced MCU with 8051 Compatible Core IC Datasheet

Version 1.5

Doc ument N o.: FT _000877

C learance N o.: FT DI#420

4.5 Digital IO AC Characteristics

Please refer to the DIO section of the FT51A Programmer’s Guide on how to enable / disable the Schmitt

trigger, control the slew rate and determine drive strength.

Parameter

Value

load

Input

Timings

(ns)

0.004pF

tplh

tphl

1.32pF

tplh

tphl

Schmitt Trigger

1.25

0.98

2.48

2.13

1.27

1.08

2.51

2.24

Output

Timings

(ns)

Slew Rate

= Normal

6pF

tplh

tphl

120pF

tplh

tphl

Drive Strength

3.33

2.37

13.34

11.13

3.13

2.21

8.22

6.78

3.02

2.15

6.46

5.32

2.95

2.10

5.57

4.59

Output

Timings

(ns)

Slew Rate

= Slow

6pF

tplh

tphl

120pF

tplh

tphl

Drive Strength

3.33

2.37

13.34

1.13

3.33

2.37

9.24

7.81

3.33

2.4

7.80

6.61

3.32

2.39

7.05

5.97

Table 4-9 – Digital IO AC Characteristics

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