NXP SC18IS604-EVB Interconnection Shield

Overview

This shield is less a plug-on module in the conventional sense than more a wiring for interconnection of certain signals from a board down to the NXP SC18IS604-EVB.

Requirements

This shield requires a board which provides a configuration that allows:

two GPIO lines, 1st for reset output and 2nd for optional interrupt input
one SPI interface, COPI for output and CIPO for input

Supported variations

The table below suggests shield variation often found on many development boards:

Connector Standard	Shield Designation	Variation
Without standard	needs board adaption	1
`Arduino UNO R3`	boards/arduino_to_nxp_sc18is604_evb_if.dtsi	2
`MikroBus`	(not yet, planned)	3

Arduino Uno (R3) headers

The connector standard Arduino UNO R3 can be used with a variety of development boards that provide it. Any of these boards must be added separately. For example, the file boards/nucleo_f746zg.overlay exists for the ST Nucleo F746ZG and simply integrates the generally valid interface boards/arduino_to_nxp_sc18is604_evb_if.dtsi:

nucleo_f746zg.overlay (as an example)

#include "arduino_to_nxp_sc18is604_evb_if.dtsi"

Serial Bus and GPIO Mapping

SPI Host Interface

arduino_to_nxp_sc18is604_evb_if.dtsi: SPI serial bus mapping

nxp_sc18is604_evb_spi: &arduino_spi {};

arduino_to_nxp_sc18is604_evb_if.dtsi: SPI host interface GPIO mapping

/ {
	nxp_sc18is604_evb_hif: nxp-sc18is604-evb-hif-pins {
		compatible = "nxp,sc18is604-evb-hif-header";
		#gpio-cells = <2>;
		gpio-map-mask = <0xffffffff 0xffffffc0>;
		gpio-map-pass-thru = <0 0x3f>;
		gpio-map = <0 0 &arduino_header 14 0>,	/* RESET_B @ D8 */
			   <1 0 &arduino_header 15 0>,	/* INT_B @ D9 */
			   <2 0 &arduino_header 19 0>,	/* SCLK @ D13 (SCK) */
			   <3 0 &arduino_header 17 0>,	/* MOSI @ D11 (COPI) */
			   <4 0 &arduino_header 18 0>,	/* MISO @ D12 (CIPO) */
			   <5 0 &arduino_header 16 0>;	/* CS_B @ D10 (SS) */
	};
};

Interconnection

Arduino Uno (R3)	`arduino-header-r3`	`nxp,sc18is604-evb-hif-header`	NXP SC18IS604-EVB
3V3			VCC
A0 / D14	0
A1 / D15	1
A2 / D16	2
A3 / D17	3
A4 / D18	4 / 20
A5 / D19	5 / 21
D0	6
D1	7
D2	8
D3	9
D4	10
D5	11
D6	12
D7	13
D8	14	0	nRESET (RESET_B)
D9	15	1	nINT (INT_B)
D10 / SS	16	5	nCS (CS_B)
D11 / COPI	17	3	MOSI
D12 / CIPO	18	4	MISO
D13 / SCK	19	2	SCLK
GND			GND

Sample Prototype

Mikro BUS headers

Note

The connector standard MikroBus is not yet supported and has yet to be defined.