Copyright © 2013 Future Technology Devices International Limited

19

DS_FT311D

USB ANDROID HOST IC Datasheet

Version 1.2

Document No.: FT_000660 Clearance No.: FTDI# 305

number of data bytes are transferred before the transaction is terminated by the master de-asserting

slave select. However the FT311D is simply a data pipe and no command is required by the FT311D itself.

Any command protocol would be defined by the Android application.

The SPI Master will transmit on MOSI as well as receive on MISO during every data stage.

Figure 5-9 Typical SPI Master Timing and Table 5.6 SPI Master Timing show an example of this.

Figure 5-9 Typical SPI Master Timing

Table 5.6 SPI Master Timing

Time

Description

Minimum

Typical

Maximum

Unit

t1

SCLK period

39.68

41.67

ns

t2

SCLK high period

19.84

20.84

21.93

ns

t3

SCLK low period

19.84

20.84

21.93

ns

t4

SCLK driving edge to

MOSI/SS

-1.5

3

ns

t5

MISO setup time to sample

SCLK edge

6.5

ns

t6

MISO hold time from sample

SCLK edge

0

ns