Datasheet
Vinculum-II Embedded Dual USB Host Controller IC
Version 1.7
Document No.: FT_000138 Clearance No.: FTDI#143
5.7 I/O Mux Interface Configuration Example
This example shows how to set a UART interface on the VNC2 64 pin package. The UART is made up of
two output signals (uart_txd and uart_rts#) and two input signals (uart_rxd and uart_cts#). For PCB
design it is best to have the four pins of the UART interface adjacent to each other. This can be achieved
easily since the four signals are members of each different groups. Figure 5.1 clearly shows that the four
groups are adjacent to each other. So the four adjacent pins can be used for the UART interface as long
as they are selected one from each of the four groups. Tables 9, 10, 11 & 12 can now be used to select
where the UART interface can be placed. Figure 5.6 shows the four UART signal selected on pins 11, 12,
13 & 14 however they could have been selected on any of the other four pins highlighted in blue dashed
lines.
54 38 21
2
3
11
12
13
V
V
C
C
I
V
C
C
I
V
C
C
I
V
C
C
uart_txd – group0
uart_rxd – group1
uart_rts# – group2
uart_cts# – group3
IOBUS0
IOBUS1
IOBUS2
IOBUS3
IOBUS4
C
C
P
L
O
O
O
14
15
16
17
18
L
33
USB1DP
34
36
37
IOBUS5
IOBUS6
IOBUS7
USB1DM
USB2DP
USB2DM
19
20
22
IOBUS8
IOBUS9
IOBUS10
IOBUS11
IOBUS12
4
5
23
24
25
26
27
XTIN
XTOUT
IOBUS13
IOBUS14
IOBUS15
9
28
29
31
RESET#
PROG#
IOBUS16
IOBUS17
IOBUS18
IOBUS19
IOBUS20
10
VNC2
64 Pin
32
39
40
41
42
7
8
VREG OUT
NC
IOBUS21
IOBUS22
IOBUS23
43
44
45
IOBUS24
IOBUS25
IOBUS26
IOBUS27
IOBUS28
46
47
48
49
50
64
IOBUS43
63
62
61
IOBUS42
IOBUS41
IOBUS40
IOBUS29
IOBUS30
IOBUS31
60
59
58
57
IOBUS39
IOBUS38
IOBUS37
IOBUS36
51
52
IOBUS32
IOBUS33
IOBUS34
IOBUS35
55
56
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
P
L
L
1
6
30 35 53
Figure 5.6 UART Example 64 pin
35
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