Datasheet
Vinculum-II Embedded Dual USB Host Controller IC
Version 1.7
Document No.: FT_000138 Clearance No.: FTDI#143
Time
t1
Description
CLKOUT period
Minimum
Typical
20.83
Maximum
Unit
ns
t2
CLKOUT high period
CLKOUT low period
CLKOUT to RXF#
9.38
9.38
1
10.42
11.46
11.46
7.83
ns
t3
10.42
ns
t4
ns
CLKOUT to
read DATA valid
t5
1
7.83
ns
t6
t7
OE# to read DATA valid
CLKOUT to OE#
1
1
7.83
7.83
ns
ns
ns
ns
ns
ns
ns
ns
ns
t8
RD# setup time
12
0
t9
RD# hold time
t10
t11
t12
t13
t14
CLKOUT TO TXE#
Write DATA setup time
Write DATA hold time
WR# setup time
1
7.83
12
0
12
0
WR# hold time
Table 6.19 Synchronous FIFO mode Read / Write Timing
6.8 General Purpose Timers
In VNC2 there are 4 General Purpose Timers available. Three are available to the designer and one is
reserved for the RTOS.
The timers have the following features:
16 bit
Count down
One shot and auto-reload
enable
Interrupt on zero
6.9 Pulse Width Modulation
VNC2 provides 8 Pulse Width Modulation (PWM) outputs. These can be used to generate PWM signals
which can be used to control motors, DC/DC converters, AC/DC supplies, etc. Further information is
available in an Application Note AN_140 - Vinculum-II PWM Example.
The features of the PWM module are as follows:
8 PWM outputs
A trigger input
8-bit prescaler
16-bit counter
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