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FT232BL 데이터시트(PDF) 5 Page - Future Technology Devices International Ltd.

부품명 FT232BL
상세설명  USB UART ( USB - Serial) I.C.
PDF  25 Pages
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제조업체  FTDI [Future Technology Devices International Ltd.]
홈페이지  http://www.ftdichip.com
Logo FTDI - Future Technology Devices International Ltd.

FT232BL 데이터시트(HTML) 5 Page - Future Technology Devices International Ltd.

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DS232BL Version 1.8
© Future Technology Devices Intl. Ltd. 2005
Page 5 of 25
FT232BL USB UART ( USB - Serial) I.C.
x8 Clock
Multiplier
UART
FIFO Controller
Serial Interface
Engine
( SIE )
USB
Protocol Engine
Baud Rate
Generator
UART
Dual Port RX
Buffer
384 Bytes
Dual Port TX
Buffer
128 bytes
3.3 Volt
LDO
Regulator
USB
Transceiver
USB DPLL
6MHZ
Oscillator
48MHz
48MHz
12MHz
XTIN
XTOUT
USBDP
USBDM
3V3OUT
VCC
TXD
RXD
RTS#
CTS#
DTR#
DSR#
DCD#
RI#
EEPROM
Interface
TXDEN
PWREN#
PWRCTL
TXLED#
RXLED#
EECS
EESK
EEDATA
SLEEP#
RESET#
TEST
GND
RESET
GENERATOR
RSTOUT#
3V3OUT
•
3.3V LDO Regulator
The 3.3V LDO Regulator generates the 3.3 volt
reference voltage for driving the USB transceiver
cell output buffers. It requires an external
decoupling capacitor to be attached to the 3V3OUT
regulator output pin. It also provides 3.3V power to
the RSTOUT# pin. The main function of this block
is to power the USB Transceiver and the Reset
Generator Cells rather than to power external logic.
However, external circuitry requiring 3.3V nominal
at a current of not greater than 5mA could also
draw its power from the 3V3OUT pin if required.
•
USB Transceiver
The USB Transceiver Cell provides the USB 1.1 /
USB 2.0 full-speed physical interface to the USB
cable. The output drivers provide 3.3 volt level slew
rate control signalling, whilst a differential receiver
and two single ended receivers provide USB data
in, SEO and USB Reset condition detection.
•
USB DPLL
The USB DPLL cell locks on to the incoming NRZI
USB data and provides separate recovered clock
and data signals to the SIE block.
•
6MHz Oscillator
The 6MHz Oscillator cell generates a 6MHz
reference clock input to the x8 Clock multiplier from
an external 6MHz crystal or ceramic resonator.
3.1 Functional Block Descriptions
3.0 Block Diagram (Simplified)



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