参数资料
型号: FT4232HL-TRAY
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 16/45页
文件大小: 0K
描述: IC USB HS QUAD UART/SYNC 64-LQFP
标准包装: 160
系列: USBmadeEZ-FIFO
特点: USB 至 UART 和(或)SPI、I2C、JTAG
通道数: 4,QUART
FIFO's: 2048 字节
规程: RS232,RS422,RS485
电源电压: 3 V ~ 3.6 V
带自动流量控制功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
配用: 768-1031-ND - MOD USB HS FT4232H EVAL
其它名称: FT4232HL - TRAY
Copyright 2010 Future Technology Devices International Limited
23
Document No.: FT_000060
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet Version 2.2
Clearance No.: FTDI#78
WRSTB#
RDSTB#
Figure 4.7 Synchronous Bit-Bang Mode Timing Interface Example
It should be noted that the FT4232H does not output the WRSTB# or RDSTB# signals when configured in
bit-bang mode. Figure 4.7. and Table 4.2 show these signals for illustration purposes only.
NAME
Description
t1
Current pin state is read
t2
RDSTB# is set inactive and data on the paralle I/O pins is read and sent to the USB host.
t3
RDSTB# is set active again, and any pins that are output will change to their new data
t4
1 clock cycle to allow for data setup
t5
WRSTB# goes active. This indicates that the host PC has written new data to the I/O parallel data
pins
t6
WRSTB# goes inactive
Table 4.2 Synchronous Bit-Bang Mode Timing Interface Example Timings
WRSTB# = this output indicates when new data has been written to the I/O pins from the Host PC (via
the USB interface).
RDSTB# = this output rising edge indicates when data has been read from the I/O pins and sent to the
Host PC (via the USB interface).
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