h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 621

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

19.4.4
A/D conversion can be externally triggered. When the TRGS1 and TRGS0 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 ADST bit is set to 1 by software. Figure 19.6 shows the timing.
19.5
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.
ADTRG
ADST
Internal trigger signal
External Trigger Input Timing
Interrupts
Figure 19.6 External Trigger Input Timing
Rev. 4.00 Jun 06, 2006 page 567 of 1004
A/D conversion
Section 19 A/D Converter
REJ09B0301-0400