参数资料
型号: V2-EVAL-EXT64
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 40/64页
文件大小: 0K
描述: MOD V2-EVAL DAUGHTER CARD 64-PIN
标准包装: 5
系列: Vinculum-II
附件类型: 子板
适用于相关产品: V2-EVAL,VCN2
产品目录页面: 634 (CN2011-ZH PDF)
其它名称: 768-1059
Document Reference No.: FT_000247
V2-EVAL Vinculum II Evaluation Board Datasheet Version 2.0
Clearance No.: FTDI#148
IOPROG#
IORESET
IOBUS23
IOBUS21
From board I/O
header pins
FT4232H I/O
UART
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
FT_TXD
FT_RXD
FT_RTS
FT_CTS
FT_DSR
FT_DTR
FT_DCD
1B1
1B2
2B1
2B2
3B1
3B2
4B1
4B2
U4
4 PORT
MUX
1A VNC2_UART_RX
VNC2_CTS#
2A
VNC2_RESET#
3A
VNC2_PROG#
4A
To VNC2
Device
DEBUG
UART
‘SNIFFER’
INTERFACE
ADBUS7
BDBUS0
BDBUS1
BDBUS2
BDBUS3
BDBUS4
BDBUS5
BDBUS6
BDBUS7
CDBUS0
CDBUS1
CDBUS2
CDBUS3
FT_RI#
DB_TXD
DB_RXD
DB_TX_ENABLE
VNC2_UART_RXD
SELECT
SN74CBT3257D
CDBUS4
CDBUS5
CDBUS6
CDBUS7
MUX SELECT
DDBUS0
DDBUS1
FT VNC RESET
MUX
CONTROL
DDBUS2
DDBUS3
DDBUS5
FT VNC PROG
SN74LVC2G125
INPUT EN
DDBUS6
DDBUS7
INPUT
U5 -2 PORT
BUFFER
OUTPUT
IN
OUT
VNC2_DEBUG
OUTPUT EN
U6 -INVERTER
Figure 6.1: FT4232H Configuration
6.1
UART Interface
The FT4232H channel A, ADBUS I/O, pins are used for UART operation with the VNC2. The UART inputs
to the FT4232H are supplied directly from the VNC2 device pins, while the UART outputs from the
FT4232H, are passed to an external multiplexer. The multiplexer allows the UART interface to the VNC2
to be driven by either by the FT4232H device or by an external UART device, which is connected to the
V2-EVAL board via the various board I/O header pins. The multiplexer select pin is controlled by pin
DDBUS0 on the FT4232H, where a logic ?0? on the select pin will force the FT4232H device to drive the
UAR T interface on the VNC2, while a logic ?1? will allow IOBUS 21 and IOBUS23 header pins on the board
to drive the UART.
Copyright ? 2010 Future Technology Devices International Limited
39
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