Many register and bit references in this document are written in general form. A lower case ānā replaces the Timer/Counter number, in this case 0. However, when using the register or bit defines in a program, the precise form must be used i.e. TCNT0 for accessing Timer/Counter0 counter value and so on.
The definitions in the table below are also used extensively throughout this datasheet.
BOTTOM | The counter reaches the BOTTOM when it becomes 0x00 |
MAX | The counter reaches its MAXimum when it becomes 0xFF (decimal 255) |