FT245RQ-REEL FTDI, FT245RQ-REEL Datasheet - Page 26

• Manufacturer Part Number: FT245RQ-REEL
• Description: USB Interface IC USB to Parallel FIFO Enhanced IC QFN-32
• Manufacturer: FTDI

Specifications of FT245RQ-REEL

• Mounting Style: SMD/SMT
• Package / Case: QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8
The following sections illustrate possible applications of the FT245R. The illustrations have omitted pin
numbers for ease of understanding since the pins differ between the FT245RL and FT245RQ package
options.
8.1 USB to MCU FIFO Interface
Figure 8.1 USB to MCU FIFO Interface
A typical example of using the FT245R as a USB to Microcontroller (MCU) FIFO interface is illustrated in
Figure 8.1. This example uses two MCU I/O ports: one port (8 bits) to transfer data and the other port (4
or 5 bits) to monitor the TXE# and RXF# status bits and generate the RD# and WR strobes to the
FT245R, when required.
Using PWREN# for this function is optional.
If the Remote Wakeup option is enabled in the internal EEPROM, during USB suspend mode RXF#
becomes an input which can be used to wake up the USB host controller by strobing the pin low.
Application Examples
SHIELD
5
Vcc
100nF
4.7uF
Copyright © 2010 Future Technology Devices International Limited
GND
1
2
3
4
+
GND
+
10nF
Ferrite
Bead
GND
100nF
VCC
VCC
USBDM
USBDP
NC
NC
VCCIO
OSCI
OSCO
RESET#
3V3OUT
A
G
N
D
FT245R USB FIFO IC Datasheet Version 2.10
G
N
D
FT245R
G
N
D
GND
G
N
D
T
E
S
T
PWREN#
Document No.: FT_000052
RXF#
TXE#
WR#
RD#
Clearance No.: FTDI# 39
D0
D1
D2
D3
D4
D5
D6
D7
Vcc
10k
I/O17
I/O10
I/O11
I/O13
I/O14
I/O15
I/O16
I/O12
I/O20
I/O21
I/O22
I/O23
I/O24
VCC
26