External Trigger Input Timing - Hitachi H8/3062 Hardware Manual

Single-chip microcomputer

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Table 14.4 A/D Conversion Time (Single Mode)

Synchronization delay

Input sampling time

A/D conversion time

Note: Values in the table are numbers of states.

External Trigger Input Timing

A/D conversion can be externally triggered When the TRGE bit is set to 1 in ADCR and the 8-bit

timer's ADTE bit is cleared to 0, external trigger input is enabled at the ADTRG pin. A high-to-

low transition at the ADTRG pin sets the ADST bit to 1 in ADCSR, starting A/D conversion.

Other operations, in both single and scan modes, are the same as if the ADST bit had been set to 1

by software. Figure 14.6 shows the timing.

Internal trigger

Figure 14.6 External Trigger Input Timing

A/D conversion