0x20 & 10 & Test & Reads a word from the test Fifo. \\
0x21 & 0--2 & Design & Design Information. Register 0/1: lower/upper part of
Unix timestamp of time of compilation. Register 2: Padiwa version number.\\
+0x22 & any & Cnt & Lower 16 Bits of input signal counters for all 16 channels.\\
+0x23 & any & Cnt & Upper 8 Bit of input signal counters.\\
0x40 & any & Memory & Read/Write to/from RAM. 16 registers with 8 Bit each.\\
0x50 & 0 & Flash & Execute Flash command.\\
0x51 & 0--1 & Flash & Load RAM content to PWM settings. Channel Bit 0 selects upper or lower half of PWM channels. No data payload\\