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FT4232H Datasheet(PDF) 28 Page - Future Technology Devices International Ltd. |
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FT4232H Datasheet(HTML) 28 Page - Future Technology Devices International Ltd. |
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28 / 43 page  Copyright © 2009 Future Technology Devices International Limited 28 Document No.: FT_000060 FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC Datasheet Version 2.05 Clearance No.: FTDI#78 6 FT4232H Configurations The following sections illustrate possible USB power configurations for the FT4232H. All USB power configurations illustrated apply to both package options for the FT4232H device 6.1 USB Bus Powered Configuration Bus Powered Application example 1: Bus powered configuration Figure 6.1 Bus Powered Configuration Example 1 Figure 6.1 illustrates the FT4232H in a typical USB bus powered design configuration. A USB bus powered device gets its power from the USB bus. In this application, the FT4232H requires that the VBUS (USB +5V) is regulated down to +3.3V (using an LDO) to supply the VCCIO, VPLL, VPHY and VREGIN. VREGIN is the +3.3V input to the on chip +1.8V regulator. The output of the on chip LDO regulator (+1.8V) drives the FT4232H core supply (VCORE). This requires a minimum of a 3.3uF filter capacitor. OSCI 2 OSCO 3 REF 6 DM 7 DP 8 TEST 13 RESET# 14 ADBUS0 16 17 18 19 21 22 23 24 26 27 28 29 30 32 33 34 SUSPEND# 36 38 39 40 41 43 44 45 46 48 VREGOUT 49 VREGIN 50 52 53 54 55 57 58 59 PWREN# 60 EECLK 62 EEDATA 61 EECS 63 Vin Vout GND LDO +3.3V GND VBUS 1 D- 2 D+ 3 GND 4 100nF 100nF 100nF 100nF GND GND GND GND GND 4.7uF 4.7uF GND GND +1.8V +3.3V +1.8V +3.3V 100nF 100nF 100nF 100nF 100nF 100nF 100nF +1.8V +1.8V +1.8V +3.3V +3.3V +3.3V +3.3V GND GND GND GND GND GND GND +3.3V +3.3V 12K 1K GND +3.3V 27pF 27pF CS 1 SCL 2 D 3 Q 4 GND 5 ORG 6 DU 7 VCC 8 93C46 GND GND GND +3.3V +3.3V 2.2K 10K 10K 10K 1 3 12MHz EECLK EEDATA GND ADBUS1 ADBUS2 ADBUS3 ADBUS4 ADBUS5 ADBUS6 ADBUS7 BDBUS0 BDBUS1 BDBUS2 BDBUS3 BDBUS4 BDBUS5 BDBUS6 BDBUS7 CDBUS0 CDBUS1 CDBUS2 CDBUS3 CDBUS4 CDBUS5 CDBUS6 CDBUS7 DDBUS0 DDBUS1 DDBUS2 DDBUS3 DDBUS4 DDBUS5 DDBUS6 DDBUS7 0? GND 3.3uF |
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