FT51A Advanced MCU with 8051 Compatible Core IC Datasheet
Version 1.5
Document No.: FT_000877
Clearance No.: FTDI#420
2.5 Pin Configuration Description
Pin Nos.
Name
Type
Description
48 pin
42
44 pin
38
32 pin
26
28 pin
27
**
POWER
Input
5 V (or 3.3 V) supply to IC
VCC5V
1.8V – 3.3V supply for the IO
pins. This option is ONLY
available on the 44 & 48 pin
packages. A fixed 3.3V supply
from the internal regulator is
supplied to the IO pins for
the 28 and 32 pin packages
POWER
Input
7
6
-
-
VCCIO
3.3V regulator output. May be
used to power VCCIO pin.
Note that a 100nF capacitor
should be connected to
VOUT3V3 for proper
operation. This output can
also be used to power
external circuitry up to a
maximum current rating of
50mA (typ).
**
POWER
Output
43
39
27
28
VOUT3V
3
8, 17, 18,
19, 28,
41, 49*
15,16,
17
14,15,
33*
POWER
Input
7, 16
GND
Ground
Table 2-1 – Power and Ground
* Pin 49 of WQFN48 or pin 33 of WQFN32 is the exposed centre pad under the packaged IC. Connect to
GND.
** If VCC5V is supplied by 3.3V then VOUT3V3 must also be driven by the same 3.3V source.
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