Datasheet

Section 18 A/D Converter

R01UH0309EJ0500 Rev. 5.00 Page 1085 of 1408

Sep 24, 2012

H8S/2456, H8S/2456R, H8S/2454 Group

ADTRG0

ADST

A/D conversion

Internal trigger

signal

Figure 18.8 External Trigger Input Timing when Multiple Units Start Simultaneously

(TRSG1, TRGS0, and EXTRGS = B'111)

18.5 Interrupt Source

The A/D converter generates an A/D conversion end interrupt (ADI) at the end of A/D conversion.

Setting the ADIE bit to 1 when the ADF bit in ADCSR is set to 1 after A/D conversion is

completed enables ADI interrupt requests. The data transfer controller (DTC) and DMA controller

(DMAC) * can be activated by an ADI interrupt. Having the converted data read by the DTC or

DMAC* in response to an ADI interrupt enables continuous conversion to be achieved without

imposing a load on software.

Note: * Only possible in unit 0.

Table 18.8 A/D Converter Interrupt Source

Name Interrupt Source Interrupt Flag DTC Activation DMAC Activation

ADI0 A/D conversion end ADF Possible* Possible

Note: * Only possible in unit 0.