DS_FT312D USB ANDROID HOST IC Datasheet
Version 1.1
Document No.: FT_000816 Clearance No.: FTDI# 331
Pin No.
Name
Type
Description
Input to 12MHz Oscillator Cell. Connect 12MHz crystal
across pins 4 and 5.
4
XTIN
INPUT
Output from 12MHz Oscillator Cell. Connect 12MHz
crystal across pins 4 and 5.
5
XTOUT
OUTPUT
8
TEST1
TEST2
RESET#
TEST0
NC
INPUT
INPUT
INPUT
OUTPUT
-
For internal use. Pull to GND
For factory use. Pull to 3V3.
Reset input (active low).
9
10
11
12
17
18
20
21
23
24
25
26
29
30
31
Leave unterminated.
No connect pins. Leave unterminated.
USBDP
USBDM
NC
INPUT/OUTPUT USB Data Signal Plus.
INPUT/OUTPUT USB Data Signal Minus.
-
-
No connect pins. Leave unterminated.
NC
No connect pins. Leave unterminated.
Transmit asynchronous data output
Receive asynchronous data input
Request to send control output
TXD
OUTPUT
INPUT
OUTPUT
INPUT
OUTPUT
-
RXD
RTS#
CTS#
TX_ACTIVE
NC
Clear to send control input
UART active signal (typically used with RS485)
No connect pins. Leave un-terminated
No connect pins. Leave un-terminated
NC
-
Output signal to indicate a problem with the USB
connection
32
USB_ERROR#
OUTPUT
Table 3.2 Function pins
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