Datasheet

Copyright © 2010 Future Technology Devices International Limited 4
Document No.: FT_000052
FT245R USB FIFO IC Datasheet Version 2.12
Clearance No.: FTDI# 39
2 FT245R Block Diagram
Clock
Multiplier
Serial Interface
Engine
( SIE )
USB
Protocol Engine
3.3 Volt
LDO
Regulator
USB
Transceiver
with
Integrated
Series
Resistors
and 1.5K
Pull-up
USB DPLL
Internal
12MHz
Oscillator
48MHz
OCSI
(optional)
OSCO
(optional)
USBDP
USBDM
3V3OUT
VCC
D0
D1
D2
D3
D4
D5
D6
D7
RD#
RXF#
TXE#
RESET#
TEST
GND
RESET
GENERATOR
3V3OUT
WR
FIFO RX Buffer
128 bytes
FIFO TX Buffer
256 bytes
Internal
EEPROM
To USB Transceiver Cell
PWREN#
To USB
Transceiver
Cell
VCCIO
FIFO Controller
with
Programmable
High Drive
Figure 2.1 FT245R Block Diagram
For a description of each function please refer to Section 4.