VNC1L-1A-TRAY FTDI, VNC1L-1A-TRAY Datasheet - Page 26

• Manufacturer Part Number: VNC1L-1A-TRAY
• Description: USB Interface IC USB Vinculum Host /Dev Ctrl IC LQFP-48
• Manufacturer: FTDI

Specifications of VNC1L-1A-TRAY

• Product Category: USB Interface IC
• Rohs: yes
• Operating Supply Voltage: 3.3 V
• Operating Supply Current: 25 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP-48
• Minimum Operating Temperature: - 40 C
• Factory Pack Quantity: 250

7.2 Block Diagram - VNC1L Programming Via USB Interface
VNC1L can be programmed from a PC USB port using an FTDI USB-serial converter such as the FT232R.
This is the fastest way to reprogram VNC1L Flash memory as data can be transferred to VNC1L at up to
1MBaud.
The required connections between VNC1L and an FT232R device for controlling the PROG# and RESET#
pins is shown in Figure 7.2.
Figure 7.2 VNC1L –Block Diagram of Programming Using USB Connection
Note that CBUS Bit Bang mode must be enabled in the FT232R EEPROM for CBUS2 and CBUS3 to enable
this operation. See FTDI application note “AN232R-01 Bit Bang Modes for the FT232R and FT245R” for
details of how to use CBUS Bit Bang mode. This is available at http://www.ftdichip.com).
To enable the bootloader, the PROG# pin must be held low and the RESET# pin must be pulsed low then
high again (this resets VNC1L).
Run mode can be enabled by driving the PROG# pin high and then resetting VNC1L by driving the
RESET# pin low then high.
For further examples of connecting VNC1L for programming, please refer to http://www.ftdichip.com
FT232R
Copyright © 2009 Future Technology Devices International Limited
CBUS2
CBUS3
VCCIO
RTS#
CTS#
GND
RXD
TXD
Vinculum VNC1L Embedded USB Host Controller IC Datasheet Version 2.02
VCC3V3
GND
10k
10k
Document Reference No.: FT_000030
RXD (ADBUS1)
PROG#
TXD (ADBUS0)
CTS# (ADBUS3)
RTS# (ADBUS2)
RESET#
GND
VNC1L-1A
Clearance No.: FTDI# 50
26