參數(shù)資料
型號(hào): FT245BM
廠商: Electronic Theatre Controls, Inc.
英文描述: FT245BM USB FIFO ( USB - Parallel ) I.C.
中文描述: FT245BM的USB先進(jìn)先出(USB端口-并行)集成電路
文件頁(yè)數(shù): 22/24頁(yè)
文件大小: 505K
代理商: FT245BM
DS245BL Version 1.6 Future Technology Devices Intl. Ltd. 2005
Page 22 of 24
FT245BL USB FIFO ( USB - Parallel ) I.C.
Figure 12
Microprocessor Interface Example
25
24
23
22
21
20
19
18
15
14
12
16
11
D0
D1
D2
D3
D4
D5
D6
D7
RD#
SI / WU
RXF#
WR
TXE#
FT245BM
IO10
IO11
IO12
IO13
IO14
IO15
IO16
IO17
IO20
IO24
IO23
IO21
IO22
Microcontroller
I
I
( Optional )
Figure 12 illustrates a typical interface between the FT245BL and a MicroController (MCU). This examples uses two
IO Ports of the MCU, one port (8 bits) to transfer data and the other port (4 / 5 bits) to monitor the TXE# and RXF#
status bits and generate the RD# and WR strobes to the FT245BL as required. Optionally, SI / WU can be connected
to another IO pin if this function is required. If the SI / WU function is not required, tie this pin of the FT245BL to
VCCIO. If the MCU is handling power management functions, then PWREN# should also be connected to an IO pin of
the MCU.
The 8 data bits of Port 1 can be shared with other peripherals when the MCU is not accessing the FT245BL.
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