UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 49

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Figure 18. PORT Type and Description (Part 2)
PORT4<7:3,1:0>
PORT1 <3:0>,
PORT1 < 7:4 >
PORT4.2
Symbol
PORT2
PORT3,
USB - ,
USB +
Out
In/
I/O
I/O
I/O
I/O
+
–
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Circuit
an_enb
TTL compatible interface
Bidirectional I/O port with internal
Schmitt input
CMOS compatible interface
Bidirectional I/O port with internal
Bidirectional I/O port with internal
pull-ups
Schmitt input.
Bidirectional I/O port
Schmitt input
Schmitt input
CMOS compatible interface
pull-ups
pull-ups
Analog input option
TTL compatible interface
Pull-up when reset
Address Latch Enable
Program Strobe Enable
Function
AI06654
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