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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
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.
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.
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.
V
C
C
I
O
V
C
C
I
O
V
C
C
I
O
V
C
C
P
V
C
C
34
33
8
USB1DP
USB1DM
RESET#
PROG#
VREG OUT
NC
USB2DP
USB2DM
4
5
XTIN
XTOUT
VNC2
64 Pin
7
10
9
37
36
54 38 21
2
3
N
G
N
D
G
N
D
G
D
G
N
D
53
35
30
6
11
12
13
14
IOBUS0
IOBUS1
IOBUS2
IOBUS3
15
16
17
18
IOBUS7
IOBUS6
IOBUS5
IOBUS4
19
20
22
23
IOBUS8
IOBUS9
IOBUS10
IOBUS11
24
25
26
27
IOBUS15
IOBUS14
IOBUS13
IOBUS12
28
29
31
32
IOBUS16
IOBUS17
IOBUS18
IOBUS19
39
40
41
42
IOBUS23
IOBUS22
IOBUS21
IOBUS20
43
44
45
46
IOBUS24
IOBUS25
IOBUS26
IOBUS27
47
48
49
50
IOBUS31
IOBUS30
IOBUS29
IOBUS28
51
52
55
56
IOBUS32
IOBUS33
IOBUS34
IOBUS35
64
63
62
61
IOBUS40
IOBUS41
IOBUS42
IOBUS43
60
59
58
57
IOBUS39
IOBUS38
IOBUS37
IOBUS36
L
P
L
G
N
D
1
L
L
uart_txd
– group0
uart_cts#
– group3
uart_rts#
– group2
uart_rxd
– group1
Figure 5.6 UART Example 64 pin