ST72321BR6-AUTO View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72321BR6-AUTO

8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface

STMicroelectronics 

ST72321Bxxx-Auto

Package pinout and pin description

Table 2.

Pin No.

Device pin description (continued)

Level

Port

Pin name

Input

Output

Main

function

(after

reset)

Alternate function

62 1 PE1/RDI

63 -(1) PE2

64

-

(2)(1)

PE3

I/O CT

I/O CT

I/O CT

XX

X

XX

X X Port E1 SCI Receive Data In

X(6) X(6) Port E2

X X Port E3

1. On the chip, each I/O port may have up to 8 pads. Pads that are not bonded to external pins are in input pull-up

configuration after reset. The configuration of these pads must be kept at reset state to avoid added current consumption.

2. On the chip, each I/O port may have up to eight pads. Pads that are not bonded to external pins are in input pull-up

configuration after reset. The configuration of these pads must be kept at reset state to avoid added current consumption.

3. It is mandatory to connect all available VDD and VAREF pins to the supply voltage and all VSS and VSSA pins to ground.

4. Not connected in 48 Kbyte and 64 Kbyte ROM devices

5. OSC1 and OSC2 pins connect a crystal/ceramic resonator or an external source to the on-chip oscillator; see Chapter 1:

Introduction on page 18 and Section 19.5: Clock and timing characteristics on page 199 for more details.

6. Pull-up always activated on PE2; see limitation Section 22.1.8: Pull-up always active on PE2 on page 244.

Legend / Abbreviations for Table 2:

Type:

I = input

O = output

S = supply

Input level:

A = dedicated analog input

In/Output level:

Output level:

C = CMOS 0.3VDD/0.7VDD

CT = CMOS 0.3VDD/0.7VDD with input trigger

HS = 20mA high sink (on N-buffer only)

Port and control configuration:

● Input:

● Output:

float = floating

wpu = weak pull-up

int = interrupt(a)

ana = analog

OD = open-drain(b)

PP = push-pull

a. 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, otherwise

the configuration is floating interrupt input.

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

implemented). See Chapter 9: I/O ports on page 75 and Section 19.8: I/O port pin characteristics on page 207

for more details.

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