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+## Hardware usage
+
+### Timers
+
+|Timer|  Type  | Usage                         | Mode                   | used ISRs      | Output connected
+|-----|--------|-------------------------------|------------------------|----------------|------------------
+|  0  |  8 bit | Millis Tick Timer             | 2 (CTC)                | COMPA          | -
+|  1  | 16 bit |                               |                        |                |
+|  2  |  8 bit | Modbus Tick Timer             | 2 (CTC)                | COMPA          | -
+|  3  | 16 bit | Step Signal Abzugsrolle       | 8 (PWM, Phase & Freq.) | -              | OC3B / PE4
+|  4  | 16 bit | Step Signal Taenzer           | 8 (PWM, Phase & Freq.) | OVF, ~~COMPA~~ | OC4A / PH3
+|  5  | 16 bit | Step Signal Rotation Spule    | 8 (PWM, Phase & Freq.) | -              | OC5C / PL5