p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 486

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 17 A/D Converter
17.4.4
External Trigger Input Timing
A/D conversion can be externally triggered. When the TRGS1 and TRGS0 bits are set to B'11 in
ADCR, an external trigger is input to the ADTRG pin. The ADST bit in ADCSR is set to 1 at the
falling edge of the ADTRG pin, thus starting A/D conversion. Other operations, in both single and
scan modes, are the same as when the ADST bit has been set to 1 by software. Figure 17.3 shows
the timing.
φ
ADTRG
Internal trigger
signal
ADST
A/D conversion
Figure 17.3 External Trigger Input Timing
Rev. 1.00 Sep. 21, 2006 Page 448 of 658
REJ09B0310-0100