Match OTP Service

This service is the second part of the one-time passcode protocol. Before using this service, the GENERATE OTP service must first be used to obtain a nonce, NFPGA, from the device.

Table 1. Match OTP Service Request
System Service Descriptor Bit Field Value Description
15:7 MBOXADDR[10:2] Mailbox address. See Table 2.
6:0 7BH Match OTP service command

The following table lists the Match OTP Service the mailbox format.

Table 2. Match OTP Service Mailbox Format
Offset Length (bytes) Parameter Direction Description
0 16 UID Input User ID
16 32 V Input

Output

 Input: Validator

Output: Set to 0 during system service execution.
48 32 OTP Input

Output

 Input: One Time Passcode

Output: Set to 0 during system service execution.
Parent topic: Passcode Services (For PolarFire SoC FPGA Only)