Document Reference No.: FT_000030
Vinculum VNC1L Embedded USB Host Controller IC Datasheet Version 2.01
Clearance No.: FTDI# 50
Combined Interface Mode
Pin No.
Name
Type
Description
UART
Interface
43
ACBUS2
I/O
5V safe bidirectional
data/control bus, AC bit 2
5V safe bidirectional
data/control bus, AC bit 3
5V safe bidirectional
data/control bus, AC bit 4
5V safe bidirectional
46
ACBUS5
I/O
data/control bus, AC bit 5,
Interface mode selection
pin
5V safe bidirectional
47
ACBUS6
I/O
data/control bus, AC bit 6,
Interface mode selection
pin
5V safe bidirectional
data/control bus, AC bit 7.
To use a 12MHz crystal
with VNC1L fit a 47k
pull-down resistor.
Alternatively, fitting a
48
ACBUS7
I/O
47k
pull-up resistor on
PortAC7
this pin will switch off the
internal clock multiplier,
allowing the device to be
fed with an external
48MHz clock signal into
XTIN
PortAC6
DATAACK#
DATAACK#
PortAC5
Parallel FIFO
Interface
RD#
SPI Slave
Interface
I/O Port
PortAC2
44
ACBUS3
I/O
WR
PortAC3
45
ACBUS4
I/O
DATAREQ#
DATAREQ#
PortAC4
Table 3.4 Data and Control Signals
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