ADuCM330/ADuCM331

Data Sheet

Rev. C | Page 12 of 16

Pin No.

Mnemonic

Description

8

GPIO4/IRQ1/LC_RX/

ECLKIN/LIN_RX

I/O

General-Purpose Input/Output 4 (P0.4) (GPIO4). By default, this pin is configured as an input.

This pin is used by the kernel in external mode. See the ADuCM330/ADuCM331 hardware

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

and, when not in use, can be left unconnected.

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

LIN Conformance Rx (LC_RX). This pin can be connected to LIN physical RX for LIN conformance

testing.

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

Local Interconnect Network Rx (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 (NTC)/Positive Temperature Coefficient (PTC)

Temperature Measurement.

11

IIN+_AUX

S

Auxiliary IIN+ Pin. 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 IIN− Pin. Connect this pin to AGND.

15

VINP_AUX

S

Auxiliary Input Voltage Positive Channel. Connect this pin to AGND.

16

VINM_AUX

S

Auxiliary Input Voltage Negative Channel. 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

DGND

S

Ground Reference for On-Chip Digital Circuits.

24

DNC

Do Not Connect. This pin is internally connected; therefore, do not externally connect to this pin.

25

DGND

S

Ground Reference for On-Chip Digital Circuits.

26

VDD

S

Battery Power Supply for On-Chip Regulator.

27

VBAT

S

Battery Voltage Input fo Resistor Divider.

28

LIN

I/O

Local Interconnect Network (LIN) Physical Interface Input/Output.

29

IO_VSS

S

Ground Reference for the LIN Pin.

30

VSS

S

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

31

DGND

S

Ground Reference for On-Chip Digital Circuits.

32

GPIO5/LC_TX/LIN_TX

I/O

General-Purpose Input/Output 5 (P0.5) (GPIO5). By default, this pin is configured as an input.

This pin is checked by the kernel on every reset. See the ADuCM330/ADuCM331 hardware

reference manual for further information. The pin has an internal 25 kΩ pull-up resistor to

33VDD and, when not in use, can be left unconnected.

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

conformance testing.

Local Interconnect Network Tx (LIN_TX). This pin can be configured as the Tx 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, O is output, and S is supply.

2

Using the 1.8 V or 3.3 V supply to power an external circuit can have POR, EMC, and self heating implications. Device evaluation and testing completed without an

external load attached.