V2-EVAL (UK) FTDI, V2-EVAL (UK) Datasheet - Page 40

• Manufacturer Part Number: V2-EVAL (UK)
• Description: Interface Modules & Development Tools USB Vinculum-II Eval Kit UK Power Supply
• Manufacturer: FTDI

Specifications of V2-EVAL (UK)

• Interface Type: USB, Serial, UART, FIFO, SPI
• Data Bus Width: Serial, 8 bit
• Operating Supply Voltage: 4.75 V to 5.25 V
• Product: Interface Modules
• For Use With/related Products: VNC2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.2
The FT4232H channel B I/O pins are used to control the debug interface on the VNC2 device.
channel is used to allow the device debug pin to be connected to a software debugger environment
running on a PC. The single bit, bi-directional debug signal from VNC2 is converted into a UART style
interface, with separate transmit and receive signals, via the 2-port buffer. The signal on the BDBUS0
pin corresponds to the transmit data from the debug software, while BDBUS1 corresponds to the receive
output from the VNC2. Pin BDBUS7, DB_TX_ENABLE, on the FT4232H is used for controlling transmit
and receive operation on the 2 port buffer.
6.3
Channel C on the FT4232H device is configured as a UART interface. The channel is used as a ‘data
sniffer’ to detect any data sent to the VNC2 UART interface. The detected data is passed to software
running on the PC for display. The feature is used for detecting and displaying UART data from external
sources which are connected to the VNC2 UART interface, via the board I/O headers.
6.4
The I/O signals on FT4232H channel D are used for additional control functions on the board.
DDBUS0 is used to control the channel select input on the multiplexer. A logic ‘0’ on the multiplexer
select pin will force multiplexer input B1 to drive the multiplexer output A, while a logic ‘1’ will force
multiplexer input B2 to drive the multiplexer output.
Pins DDBUS1 and DDBUS2 are used for controlling the PROG# and RESET# inputs on the VNC2 from the
software via the FT4232H.
multiplexer select input will allow the VNC2 PROG# and RESET# pins to be controlled by the FT4232H.
Table 6.1, summarises the V2-EVAL board settings based on the value of the multiplexer select pin.
Multiplexer Select Pin Status
(Set by FT4232H DDBUS0)
Table 6.1
Debug Interface – UART Mode
UART ‘Sniffer’ Interface
Device Control – Bit Bang Mode
0
1
Multiplexer Configuration Settings
Copyright © 2010 Future Technology Devices International Limited
Both pins are passed to the onboard multiplexer.
VNC2 UART interface connected to header pins on V2-EVAL board.
VNC2 RESET# connected to prototyping area header pin 50.
VNC2 PROG# connected to prototyping area header pin 49.
VNC2 UART interface connected to FT4232H channel A.
VNC2 RESET# connected to FT4232H DDBUS1 output.
VNC2 PROG# connected to FT4232H DDBUS2 output.
V2-EVAL Vinculum II Evaluation Board Datasheet Version 1.0
Board Configuration Status
Document Reference No.: FT_000247
Clearance No.: FTDI#148
A logic ‘0’ on the
The
Pin
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