參數(shù)資料
型號(hào): FT245BM
廠商: Future Technology Devices International Ltd
元件分類: 微控制器/微處理器
中文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PQFP32
封裝: 7 X 7 MM, 0.80 MM PITCH, LQFP-32
文件頁(yè)數(shù): 2/24頁(yè)
文件大?。?/td> 995K
代理商: FT245BM
DS245B Version 1.7
Future Technology Devices Intl. Ltd. 2005
Page 10 of 24
FT245BM USB FIFO ( USB - Parallel ) I.C.
POWER AND GND GROUP
Pin#
Signal
Type
Description
6
3V3OUT
OUT
3.3 volt Output from the integrated L.D.O. regulator This pin should be decoupled
to GND using a 33nF ceramic capacitor in close proximity to the device pin. Its
prime purpose is to provide the internal 3.3V supply to the USB transceiver cell
and the RSTOUT# pin. A small amount of current (<= 5mA) can be drawn from
this pin to power external 3.3V logic if required.
3,26
VCC
PWR
+4.35 volt to +5.25 volt VCC to the device core, LDO and none-FIFO interface
pins.
13
VCCIO
PWR
+3.0 volt to +5.25 volt VCC to the FIFO interface pins 10..12, 14..16 and 18..25.
When interfacing with 3.3V external logic in a bus powered design connect
VCCIO to a 3.3V supply generated from the USB bus. When interfacing with
3.3V external logic in a self powered design connect VCCIO to the 3.3V supply
of the external logic. Otherwise connect to VCC to drive out at 5V CMOS level.
9,17
GND
PWR
Device - Ground Supply Pins
30
AVCC
PWR
Device - Analog Power Supply for the internal x8 clock multiplier
29
AGND
PWR
Device - Analog Ground Supply for the internal x8 clock multiplier
Note 1 : In Input Mode, these pins are pulled to VCCIO via internal 200K resistors. These can be programmed to
gently pull low during USB suspend ( PWREN# = “1” ) by setting this option in the EEPROM.
Note 2: During device reset, these pins are tri-state but pulled up to VCCIO via internal 200K resistors.
Note 3: During device reset, these pins are tri-state but pulled up to VCC via internal 200K resistors.
OBSOLETE
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