Data Sheet

ADuCM330WFS/ADuCM331WFS

Rev. A | Page 13 of 17

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

NOTES

1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.

2. IT IS RECOMMENDED THAT THE EXPOSED PAD BE

SOLDERED TO GROUND FOR THERMAL REASONS.

1

DNC

2

DGND

3

DVDD18

4

DVDD33

5

33VDD

6

AVDD18

7

AGND

8

VREF

24

23

22

21

20

19

18

17

RESET

SWDIO

SWCLK

GPIO0/CS/LIN_RX

GPIO1/SCLK/LIN_TX

GPIO2/MISO

GPIO3/IRQ0/MOSI/LC_TX/LIN_TX

GPIO4/IRQ1/LC_RX/ECLKIN/LIN_RX

TOP VIEW

(Not to Scale)

ADuCM330WFS/

ADuCM331WFS

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Type1

Description

1

RESET

I

Reset Input. Active low. This pin has an internal pull-up resistor to 33VDD.

2

SWDIO

I/O

Cortex-M3 Debug Data Input and Output. At power-on, this output is disabled and pulled high via

an internal pull-up resistor. This pin can be left unconnected when not in use.

3

SWCLK

I

Cortex-M3 Debug Clock Input. This is an input only pin and has an internal pull-up resistor.

This pin can be left unconnected when not in use.

4

GPIO0/CS/LIN_RX

I/O

General-Purpose Input/Output 0 (GPIO0). By default, this pin is configured as an input. The pin has

an internal 25 kΩ pull-up resistor to 33VDD and can be left unconnected when not in use.

Chip Select (CS). When configured, this pin also operates the SPI chip select input.

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

for LIN frames in external transceiver mode.

5

GPIO1/SCLK/LIN_TX

I/O

General-Purpose Input/Output 1 (GPIO1). 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.

Serial Clock Input (SCLK). When configured, this pin operates the SPI serial clock input.

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

pin for LIN frames in external transceiver mode.

6

GPIO2/MISO

I/O

General-Purpose Input/Output 2 (GPIO2). By default, this pin is configured as an input. The pin has

an internal 25 kΩ pull-up resistor to 33VDD and can be left unconnected when not in use.

Master Input/Slave Output (MISO). When configured, this pin also operates the SPI master

input/slave output.

7

GPIO3/IRQ0/MOSI/

LC_TX/LIN_TX

I/O

General-Purpose Input/Output 3 (GPIO3). 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 (IRQ0). This pin can also be configured as the External Interrupt Request 0.

Master Output/Slave Input (MOSI). This pin can be configured as an SPI master output/slave

input pin.

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 also be connected as the

transmitter pin for LIN frames in external transceiver mode.