ST72104GX-AUTO datasheet(9/135 Pages) STMICROELECTRONICS

9 / 135 page

ST72104Gx-Auto, ST72215Gx-Auto, ST72216Gx-Auto, ST72254Gx-Auto

9/135

Notes:

1. In the interrupt input column, “eiX” defines the associated external interrupt vector. If the weak pull-up column (wpu) is

merged with the interrupt column (int), then the I/O configuration is pull-up interrupt input, else the configuration is floating

interrupt input.

2. In the open drain output column, “T” defines a true open drain I/O (P-Buffer and protection diode to VDD are not imple-

mented). See Section 9 "I/O PORTS" on page 30 and Section 13.8 "I/O PORT PIN CHARACTERISTICS" on page 116

for more details.

3. OSC1 and OSC2 pins connect a crystal or ceramic resonator, an external RC, or an external source to the on-chip

oscillator see Section 2 "PIN DESCRIPTION" on page 7 and Section 13.5 "CLOCK AND TIMING CHARACTERISTICS"

on page 104 for more details.

18 PA7

I/O CT HS X

ei0

Port A7

19 PA6 /SDAI

I/O CT HS X

ei0

Port A6

2C Data

20 PA5

I/O CT HS X

ei0

Port A5

21 PA4 /SCLI

I/O CT HS X

ei0

Port A4

2C Clock

22 PA3

I/O CT HS X

ei0

Port A3

23 PA2

I/O CT HS X

ei0

Port A2

24 PA1

I/O CT HS X

ei0

Port A1

25 PA0

I/O CT HS X

ei0

Port A0

26 ISPSEL

In-situ programming selection (should be tied low in

standard user mode).

27 VSS

Ground

28 VDD

Main power supply

Level

Port / Control

Main

Function

(after reset)

Alternate Function

No.

Name

Input

Output

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