參數資料
型號: FT4232HQ-REEL
廠商: FTDI, Future Technology Devices International Ltd
文件頁數: 27/45頁
文件大?。?/td> 0K
描述: IC USB HS QUAD UART/SYNC 64-QFN
標準包裝: 1
系列: USBmadeEZ-FIFO
特點: USB 至 UART 和(或)SPI、I2C、JTAG
通道數: 4,QUART
FIFO's: 2048 字節(jié)
規(guī)程: RS232,RS422,RS485
電源電壓: 3 V ~ 3.6 V
帶自動流量控制功能:
帶調制解調器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 64-VFQFN 裸露焊盤
供應商設備封裝: 64-QFN 裸露焊盤(9x9)
包裝: 標準包裝
產品目錄頁面: 634 (CN2011-ZH PDF)
配用: 768-1031-ND - MOD USB HS FT4232H EVAL
其它名稱: 768-1027-6
Copyright 2010 Future Technology Devices International Limited
33
Document No.: FT_000060
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet Version 2.2
Clearance No.: FTDI#78
6.3 Oscillator Configuration
Figure 6.5 Recommended FT4232H Crystal Oscillator Configuration.
Figure 6.5 illustrates how to connect the FT4232H with a 12MHz ± 0.003% crystal. In this case loading
capacitors should to be added between OSCI, OSCO and GND as shown. A value of 27pF is shown as the
capacitor in the example – this will be good for many crystals but it is recommended to select the loading
capacitor value based on the manufacturer’s recommendations wherever possible. It is recommended to
use a parallel cut type crystal.
It is also possible to use a 12 MHz oscillator with the FT4232H. In this case the output of the oscillator
would drive OSCI, and OSCO should be left unconnected. The oscillator must have a CMOS output drive
capability.
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
OSCI Vin
Input Voltage
2.97
3.30
3.63
V
FIn
Input Frequency
12
MHz
+/- 30ppm
Ji
Cycle to cycle jitter
< 150
pS
Table 6.1 OSCI Input characteristics
OSCI
OSCO
2
3
FT4232H
Crystal
12MHz
27pF
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