FTDI Vinculum-II VNC2-32L1B, Manual

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Copyright © Future Technology Devices International Limited
Datasheet
Vinculum-II Embedded Dual USB Host Controller IC
Version 1.6
Document No.: FT_000138 Clearance No.: FTDI# 143
Time Description Minimum Typical Maximum Unit
t1 CLKOUT period 20.83 ns
t2 CLKOUT high period 9.38 10.42 11.46 ns
t3 CLKOUT low period 9.38 10.42 11.46 ns
t4 CLKOUT to RXF# 1 7.83 ns
t5
CLKOUT to
read DATA valid
1 7.83 ns
t6 OE# to read DATA valid 1 7.83 ns
t7 CLKOUT to OE# 1 7.83 ns
t8 RD# setup time 12 ns
t9 RD# hold time 0 ns
t10 CLKOUT TO TXE# 1 7.83 ns
t11 Write DATA setup time 12 ns
t12 Write DATA hold time 0 ns
t13 WR# setup time 12 ns
t14 WR# hold time 0 ns
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