參數(shù)資料
型號: FT2232HL-TRAY
廠商: FTDI, Future Technology Devices International Ltd
文件頁數(shù): 51/67頁
文件大?。?/td> 0K
描述: IC USB HS DUAL UART/FIFO 64-LQFP
標準包裝: 160
系列: USBmadeEZ-FIFO,F(xiàn)T-X,X-Chip
特點: USB 至 UART 和(或)FIFO、SPI、I2C、JTAG
通道數(shù): 2,DUART
FIFO's: 4096 字節(jié)
規(guī)程: RS232,RS422,RS485
電源電壓: 3 V ~ 3.6 V
帶并行端口:
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-LQFP
供應商設備封裝: 64-LQFP
包裝: 托盤
其它名稱: FT2232HL - TRAY
Copyright 2012 Future Technology Devices International Limited
55
Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Version 2.21
Clearance No.: FTDI#77
6.3 Oscillator Configuration
OSCI
OSCO
2
3
FT2232H
Crystal
12MHz
27pF
Figure 6.5 Recommended FT2232H Crystal Oscillator Configuration.
Figure 6.5 illustrates how to connect the FT2232H 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 manufacturers 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 FT2232H. 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
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