VNC2-48Q1B-REEL FTDI, VNC2-48Q1B-REEL Datasheet - Page 66

• Manufacturer Part Number: VNC2-48Q1B-REEL
• Description: USB Interface IC Vinculum-II Dual USB Host/Dev IC QFN-48
• Manufacturer: FTDI
• Type: USB Host/Device Controllerr

Specifications of VNC2-48Q1B-REEL

• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Supply Current: 25 mA
• Operating Supply Voltage: 1.8 V, 3.3V
• Package / Case: QFN-48
• Description/function: USB Vinculum-II Dual Host/Dev IC QFN-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: VINCULUM2

Table 31 S
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.
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 -
The features of the PWM module are as follows:
A single PWM cycle can have up to 4 pulses (8 edges). The PWM block uses a 16-bit counter to
determine the period of a single PWM cycle. This counter counts system clocks which can also be divided
by an optional 8-bit prescaler. The PWM drivers allow the user to select when PWM output toggles. These
values correspond to the values of 16-bit counter. For example, on the timing diagram below - Figure
6-24, the 16-bit counter counts to 23 and pwm_out[0] output toggles when the counter‟s current value
is equal to 7, 8, 12, 14, 15, 16, 19 and 22.
Figure 6-24 PWM – Timing Diagram
The timers have the following features:
Time
t10
t11
t12
t13
t14
-
-
-
-
-
-
16 bit
Count down
One shot and auto-reload
enable
Interrupt on zero
8 PWM outputs
A trigger input
8-bit prescaler
16-bit counter
Generation of up to 4-pulse signal with controlled output enable and configurable initial state
Interrupt
ynchronous
Write DATA setup time
Write DATA hold time
CLKOUT TO TXE#
WR# setup time
WR# hold time
Description
Copyright © 2010 Future Technology Devices International Limited
FIFO mode Read / Write Timing
VINCULUM-II EMBEDDED DUAL USB HOST CONTROLLER IC Datasheet
Minimum
Vinculum-II PWM
12
12
1
0
0
Typical
Example.
Maximum
Document No.: FT_000138
Clearance No.: FTDI#
7.83
Unit
ns
ns
ns
ns
ns
Version -
143
1.2
66