Table 19.4 A/D Conversion Time (Single Mode)
Input sampling time
A/D conversion time
A/D External Trigger Input Timing
A/D conversion can be externally triggered. When the TRGE bit is set to 1 in ADCR, the external
trigger input is enabled by TMOUT#. A high-to-low transition at the TMOUT# sets the ADST bit
of ADCSR to 1, and starts A/D conversion. Other operation, in both single and scan modes, are the
same as if the ADST bit had been set to 1 by software. Figure 19-5 shows the timing.
The A/D converter generates an interrupt (ADI) at the end of A/D conversion. The ADI interrupt
request can be enabled or disabled by the ADIE bit in ADCSR.
Rev. 3.0, 03/01, page 344 of 390
Figure 19.5 External Trigger Input Timing
unit: µ µ µ µ s