Input Modes

The user can select between 10 input modes. The selection is done by writing the Input Mode bit field (INPUTMODE) in the Input control x register (TCD.INPUTCTRLx).

Table 1. Input mode description
INPUTMODE	Description
0x0	Input has no action
0x1	Stop output, jump to opposite compare cycle and wait
0x2	Stop output, execute opposite compare cycle and wait
0x3	Stop output, execute opposite compare cycle while fault active
0x4	Stop all outputs, maintain frequency
0x5	Stop all outputs, execute dead time while fault active
0x6	Stop all outputs, jump to next compare cycle and wait
0x7	Stop all outputs, wait for software action
0x8	Stop output on edge, jump to next compare cycle
0x9	Stop output on edge, maintain frequency
0xA	Stop output at level, maintain frequency
other	Reserved

Not all input modes works in all waveform generation modes. Below is a table that shows what waveform generation modes the different input modes are valid in.

Table 2. Ramp mode the different input modes are vaild in
INPUTMODE	One Ramp mode	Two ramp mode	Four ramp mode	Dual slope mode
0x1	Valid	Valid	Valid	Do not use
0x2	Do not use	Valid	Valid	Do not use
0x3	Do not use	Valid	Valid	Do not use
0x4	Valid	Valid	Valid	Valid
0x5	Do not use	Valid	Valid	Do not use
0x6	Do not use	Valid	Valid	Do not use
0x7	Valid	Valid	Valid	Valid
0x8	Valid	Valid	Valid	Do not use
0x9	Valid	Valid	Valid	Do not use
0xA	Valid	Valid	Valid	Do not use

In the following sections the different input modes are presented in detail.