FT232BM(2004) 查看數據表（PDF） - Future Technology
零件编号
产品描述 (功能)
生产厂家
FT232BM Datasheet PDF : 54 Pages
| |||
3.0 Simplified Block Diagram
FT2232C Dual USB UART / FIFO I.C.
VCC
3V3OUT
PWRCTL
3.3 Volt
LDO
Regulator
PWREN#
48MHz
Baud Rate
Generator
Dual Port TX
Buffer
128 bytes
Dual Port RX
Buffer
384 Bytes
USBDP
USBDM
USB
Transceiver
Serial Interface
Engine
( SIE )
USB
Protocol Engine
Dual Port TX
Buffer
128 bytes
USB DPLL
Dual Port RX
Buffer
384 Bytes
XTOUT
XTIN
TEST
GND
6MHZ
Oscillator
x8 Clock
Multiplier
48MHz
12MHz
48MHz
EEPROM
Interface
EECS
EESK
EEDATA
RESET#
Figure 1 - FT2232C Simplified Block Diagram
Baud Rate
Generator
3V3OUT
RESET
GENERATOR
Channel A
Multi-
Purpose
UART / FIFO
Controller
Channel B
Multi-
Purpose
UART / FIFO
Controller
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
ACBUS0
ACBUS1
ACBUS2
ACBUS3
SI/WUA
BDBUS0
BDBUS1
BDBUS2
BDBUS3
BDBUS4
BDBUS5
BDBUS6
BDBUS7
BCBUS0
BCBUS1
BCBUS2
BCBUS3
SI/WUB
RSTOUT#
3.1 Functional Block Descriptions
• 3.3V LDO Regulator
• USB Transceiver
The 3.3V LDO Regulator generates the 3.3 volt
The USB Transceiver Cell provides the USB 1.1 /
reference voltage for driving the USB transceiver
USB 2.0 full-speed physical interface to the USB
cell output buffers. It requires an external
cable. The output drivers provide 3.3 volt level slew
decoupling capacitor to be attached to the 3V3OUT
rate control signalling, whilst a differential receiver
regulator output pin. It also provides 3.3V power to
and two single ended receivers provide USB data
the RSTOUT# pin. The main function of this block
in, SEO and USB Reset condition detection.
is to power the USB Transceiver and the Reset
Generator Cells rather than to power external logic. • USB DPLL
However, external circuitry requiring 3.3V nominal
The USB DPLL cell locks on to the incoming NRZI
at a current of not greater than 5mA could also
USB data and provides separate recovered clock
draw its power from the 3V3OUT pin if required.
and data signals to the SIE block.
DS2232C Version 1.2
© Future Technology Devices International Ltd. 2004
Page 6 of 54
Share Link: 