ADuCM330WFS/ADuCM331WFS

Data Sheet

Rev. A | Page 14 of 17

Pin No.

Mnemonic

Description

8

GPIO4/IRQ1/LC_RX/

ECLKIN/LIN_RX

I/O

General-Purpose Input/Output 4 (GPIO4). By default, this pin is configured as an input. This pin is

used by the kernel in external mode. See the ADuCM330WFS/ADuCM331WFS Hardware Reference

Manual for more information. The pin has an internal 25 kΩ pull-up resistor to 33VDD and can be

left unconnected when not in use.

Interrupt Request (IRQ1). This pin can be configured as the External Interrupt Request 1.

LIN Conformance Receiver (LC_RX). This pin can be connected to the LIN physical receiver for

LIN conformance testing.

External Clock (ECLKIN). This pin can be configured as the external clock input.

Local Interconnect Network Receiver (LIN_RX). This pin can be configured as the receiving pin

for LIN frames in external transceiver mode.

9

GND_SW

I

Switch to Internal Analog Ground Reference. This pin is the negative input for the external

temperature channel.

10

VTEMP

I

External Pin for Negative Temperature Coefficient/Positive Temperature Coefficient

Temperature Measurement.

11

IIN+_AUX

S

Auxiliary Positive Differential Input Pin. If not used, connect this pin to AGND.

12

IIN+

I

Positive Differential Input for Current Channel.

13

IIN−

I

Negative Differential Input for Current Channel.

14

IIN−_AUX

S

Auxiliary Negative Differential Input Pin. If not used, connect this pin to AGND.

15

VINP_AUX

S

Auxiliary Input Voltage Positive Channel. If not used, connect this pin to AGND.

16

VINM_AUX

S

Auxiliary Input Voltage Negative Channel. If not used, connect this pin to AGND.

17

VREF

S

Voltage Reference Pin. Connect this pin via a 470 nF capacitor to ground. This pin can also be

used to input an external voltage reference. This pin cannot be used to supply an external circuit.

18

AGND

S

Ground Reference for On-Chip Precision Analog Circuits.

19

AVDD18

S

20

33VDD

S

21

DVDD33

S

22

DVDD18

S

23, 25, 31

DGND

S

Ground Reference for On-Chip Digital Circuits.

24

DNC

Do Not Connect. Do not connect to this pin.

26

VDD

S

Battery Power Supply for On-Chip Regulator.

27

VBAT

S

Battery Voltage Input for Resistor Divider.

28

LIN

I/O

Local Interconnect Network Physical Interface Input/Output.

29

IO_VSS

S

Ground Reference for LIN.

30

VSS

S

Ground Reference. This pin is the ground reference for the internal voltage regulators.

32

GPIO5/LC_TX/LIN_TX

I/O

General-Purpose Input/Output 5 (GPIO5). By default, this pin is configured as an input. This pin

is checked by the kernel on every reset. See the ADuCM330WFS/ADuCM331WFS Hardware

Reference Manual for more information. The pin has an internal 25 kΩ pull-up resistor to 33VDD

and can be left unconnected when not in use.

LIN Conformance Transmitter (LC_TX). This pin can be connected to the LIN physical

transmitter for LIN conformance testing.

Local Interconnect Network Transmitter (LIN_TX). This pin can be configured as the transmitter

pin for LIN frames in external transceiver mode.

33

EPAD

Exposed Pad. It is recommended that the exposed pad be soldered to ground for thermal reasons.

1

I is input, I/O is input/output, and S is supply.

2

Using the 1.8 V or 3.3 V supply to power an external circuit can have POR, electromagnetic compliance (EMC), and self heating implications. Device evaluation and

testing completed without an external load attached.