VNC1L-1A-TRAY FTDI, VNC1L-1A-TRAY Datasheet - Page 15

• 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

5.1.1 UART Mode Signal Descriptions
Table 5.2 Data and Control Bus Signal Mode Options - UART Interface
In RS485 designs, a transmit data enable signal, TXDEN, may be used to signal that a transmit operation
is in progress. TXDEN will be set high one bit-time before data is transmitted and return low one bit time
after the last bit of a data frame has been transmitted.
The ring indicator pin, RI#, is used to wake up VNC1L from suspend mode. The suspend mode can be
entered using a firmware monitor command.
Pin No.
31
32
33
34
35
36
37
38
41
DATAREQ#
DATAACK#
TXDEN
DCD#
Name
RTS#
CTS#
TXD
RXD
RI#
Copyright © 2009 Future Technology Devices International Limited
Output
Output
Output
Output
Input
Input
Input
Input
Input
Type
Vinculum VNC1L Embedded USB Host Controller IC Datasheet Version 2.02
Description
Transmit asynchronous data output
Receive asynchronous data input
Request To Send Control Output
Clear To Send Control Input
Data Acknowledge (Data Terminal Ready Control) Output
Data Request (Data Set Ready Control) Input
Data Carrier Detect Control Input
Ring Indicator Control Input. RI# low can be used to resume the PC USB Host
controller from suspend.
Enable Transmit Data for RS485 designs
Document Reference No.: FT_000030
Clearance No.: FTDI# 50
15