topic OM-SE050ARD Board Configuration and Connections for ISO7816 in Secure Authentication

OM-SE050ARD Board Configuration and Connections for ISO7816

msjcard — Sat, 30 Apr 2022 01:31:44 GMT

AN13539 Describes the configuration of the OM-SE050ARD board for I2C and for ISO14443 (NFC) connectivity, but doesn't mention configuration for making the chip talk directly to an ISO7816 card reader.

Can any one provide me with:

1) The jumper setup for the board for ISO7816?

2) The mapping between the board signals and the signals on an ISO7816 connector. For reference the ISO pins are,

C1 - VCC; C2-RST; C3 CLK; C4 - n/c; C5 GND; C6 VPP; C7 - I/O; C8 n/c

I'm assuming I need to connect at least C1, C3, C5 and C7, and I may need to connect to C2. Looking at the datasheet for the SE050 I *think* that means something like:

C1 -> Pin 18 Vcc -> j11-1 (or C1 -> Pin 12 Vin -> J11-2??)

C2 -> Pin 14 Rst -> J11-3 (or tie pin 14 to ground?)

C3 -> Pin 13 Clk -> J11-6

C5 -> Pin 19 Vss (ground) -> J11-7

C7 -> Pin 3 ISO7816 IO1 -> J11-9

and maybe J11-1 to J11-10 (Enable to Vcc)?

Thanks - Mike

Re: OM-SE050ARD Board Configuration and Connections for ISO7816

Gerald_H — Wed, 04 May 2022 13:55:38 GMT

Hello Mike!

The schematic is better shown in
https://www.nxp.com/downloads/en/schematics/SE050ARD-SCH.pdf
The Jumpers J28 - J34 are shorted by a wire on the PCB.
So the ISO 7816 signals are available on the DB-15 connector contacts J3 and the pin-header J11.

The probe IN-CLA7816 mentioned in the hardware overview application note is available at Ashling:
https://www.ashling.com/ashling-nxp-smart-card-ic/
This can be directly inserted into a reader like a card.

Correct:
C1 -> Pin 18 Vcc -> J11-1 (other possibilities see AN13539, "4.2 Power supply options")
C2 -> Pin 14 Rst -> J11-3 (do not fix to ground, otherwise no proper activation will be possible)
C3 -> Pin 13 Clk -> J11-6
C5 -> Pin 19 Vss -> J11-7
C7 -> Pin 3 ISO7816 IO1 -> J11-9
No special jumper configuration required for this setup.

With best regards
Gerald