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IOBUS0 데이터시트(PDF) 62 Page - Future Technology Devices International Ltd.

부품명 IOBUS0
상세설명  Vinculum-II Embedded Dual USB Host Controller IC
PDF  88 Pages
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제조업체  FTDI [Future Technology Devices International Ltd.]
홈페이지  http://www.ftdichip.com
Logo FTDI - Future Technology Devices International Ltd.

IOBUS0 데이터시트(HTML) 62 Page - Future Technology Devices International Ltd.

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C opyright © Future T ec hnology Devic es I nternational Limited
Datasheet
Vinculum-II Embedded Dual USB Host Controller IC
V ers ion 1 .7
Doc ument N o.: FT _000138 C learance N o.: FT DI# 1 43
6.7.1 Read / Write Transaction Synchronous FIFO Mode
When in Synchronous FIFO interface mode, the timing of read and write operations on the FIFO interface
are shown in Figure 6.23 Synchronous FIFO mode Read / Write Cycle and Table 6.19
Synchronous FIFO mode Read / Write Timing
In synchronous mode data can be transmitted to and from the FIFO module on each clock edge. An
external device synchronises to the CLKOUT output and it also has access to the output enable OE# input
to control data flow. An external device should drive output enable OE# low before pulling RD# line
down.
When bursts of data are to be read from the module RD# should be kept low. RXF# remains low when
there is still data to be read. Similarly when bursts of data are to be written to the module WR# should
be kept low. TXE# remains low when there is still space available for the data to be written.
Figure 6.23 Synchronous FIFO mode Read / Write Cycle



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