Document No.: FT_000288
FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 1.3
Clearance No.: FTDI #199
3.3
Signal Description
The operation of the following FT232H pins are the same regardless of the configured mode:-
Pin No.
40
Name
**
VREGIN
Type
POWER
input
POWER
output
POWER
output
POWER
output or
input
POWER
input
POWER
Input
POWER
Input
POWER
Input
POWER
Input
+3.3V output or input.
Description
+5.0V or 3V3 power supply input.
37
VCCA
+1.8V output. Should not be used
38
VCORE
+1.8V output.
Should not be used.
39
**
VCCD
12, 24, 46
VCCIO
+3.3V input. I/O interface power supply input
+3.3V input. Internal PLL power supply input. It is
recommended that this supply is filtered using an LC filter.
(See figure 6.1)
+3.3V input. Internal USB PHY power supply input. Note that
this cannot be connected directly to the USB supply. A +3.3V
regulator must be used. It is recommended that this supply is
filtered using an LC filter.(See figure 6.1)
0V Ground input.
8
VPLL
3
VPHY
4,9,41
AGND
10,11,22,23,35,36,47,48
Table 3.1 Power and Ground
GND
0V Ground input.
** If pin 40 (VREGIN) is +5.0V, pin 39 becomes an output and If pin 40 (VREGIN) is 3V3 pin 39 becomes
an input.
Pin No.
1
2
5
6
7
42
34
Name
OSCI
OSCO
REF
DM
DP
TEST
RESET#
Type
INPUT
OUTPUT
INPUT
INPUT
INPUT
INPUT
INPUT
Oscillator input.
Oscillator output.
Description
Current reference – connect via a 12KΩ resistor @ 1% to GND.
USB Data Signal Minus.
USB Data Signal Plus.
IC test pin – for normal operation must be connected to GND.
Reset input (active low).
Table 3.2 Common Function pins
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