Datasheet

Table Of Contents
Section 16 A/D Converter
Page 612 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
Table 16.4 A/D Conversion Time (Scan Mode)
CKS1 CKS0 Conversion Time (State)
0 512 (Fixed)
0
1 256 (Fixed)
1 0 128 (Fixed)
1 64 (Fixed)
16.5.4 External Trigger Input Timing
A/D conversion can be externally triggered. When the TRGS0 and TRGS1 bits are set to 11 in
ADCR, external trigger input is enabled at the ADTRG pin. A falling edge 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 when the bit ADST has been set to 1 by software. Figure 16.6 shows the
timing.
φ
ADTRG
Internal trigger signal
ADST
A/D conversion
Figure 16.6 External Trigger Input Timing