UPSD3212A Datasheet, PDF (43/163 Pages) STMicroelectronics – Flash Programmable System Devices with 8032 MCU with USB and Programmable Logic

Figure 18. PORT Type and Description (Part 2)
In/
Symbol
Out
PORT1 <3:0>, I/O
PORT3,
PORT4<7:3,1:0>
PORT2
Circuit
uPSD3212A, uPSD3212C, uPSD3212CV
Function
Bidirectional I/O port with
internal pull-ups
Schmitt input
CMOS compatible interface
PORT1 < 7:4 > I/O
PORT4.2
I/O
Bidirectional I/O port with
internal pull-ups
Schmitt input
CMOS compatible interface
Analog input option
an_enb
Bidirectional I/O port with internal
pull-ups
Schmitt input.
TTL compatible interface
USB–, USB+
I/O
+
–
Bidirectional I/O port
Schmitt input
TTL compatible interface
AI07428b
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