参数资料
型号: FT232HQ-REEL
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 31/65页
文件大小: 0K
描述: IC HS USB TO UART/FIFO 48QFN
应用说明: FT1248 Application Note
标准包装: 1
通道数: 1,UART
FIFO's: 4kb
规程: RS232,RS422,RS485
电源电压: 1.62 V ~ 1.98 V,2.97 V ~ 3.63 V
带并行端口:
带故障启动位检测功能:
带调制解调器控制功能:
安装类型: 表面贴装
封装/外壳: 48-VFQFN 裸露焊盘
供应商设备封装: 48-QFN(8x8)
包装: 标准包装
其它名称: 768-1102-6
Copyright 2012 Future Technology Devices International Limited
37
Document No.: FT_000288
FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 1.8
Clearance No.: FTDI #199
MPSSE mode is enabled using the FT_SetBitMode D2xx driver command with a hex value of 0x02. A hex
value of 0x00 will reset the device. See application note AN135 – MPSSE Basics for more details and
examples.
The MPSSE command set is fully described in application note AN108 – Command Processor For
4.8.1
MPSSE Adaptive Clocking
The Adaptive Clock mode correlates the CLK signal with a return clock RTCK. This is a technique used by
ARM processors.
The FT232H will assert the TCK line and wait for the RTCK to be returned from the target device to
GPIOL3 line before changing the TDO (data out line).
FT2232H
ARM CPU
RTCK
TCK
TDO
GPIOL3
Figure 4.15 Adaptive Clocking Interconnect
TDO
TCK
RTCK
TDO changes on falling
edge of TCK
Figure 4.16: Adaptive Clocking waveform.
Adaptive clocking is not enabled by default.
For further details on MPSSE adaptive clocking please refer to AN_108
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