YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 491

Manufacturer Part Number

YR0K42378FC000BA

KIT EVAL FOR H8S/2378

Manufacturer

Renesas Electronics America

For Use With/related Products

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

At the start of activation source acceptance, low level sensing is used for both falling edge sensing

and low level sensing on the EDREQ pin. Therefore, a request is accepted in the case of a low

level at the EDREQ pin that occurs before execution of the EDMDR write for setting the transfer-

enabled state.

When the EXDMAC is activated, make sure, if necessary, that a low level does not remain at the

EDREQ pin from the previous end of transfer, etc.

When transfer is started while the IRF bit is set to 1 in EDMDR, if the EDIE bit is set to 1 in

EDMDR together with the EDA bit in EDMDR, enabling interrupt requests, an interrupt will be

requested since EDIE = 1 and IRF = 1. To prevent the occurrence of an erroneous interrupt request

when transfer starts, ensure that the IRF bit is cleared to 0 before the EDIE bit is set to 1.

If the last EXDMAC transfer cycle and a CBR refresh cycle occur simultaneously, note that

although the CBR refresh and the last transfer cycle may be executed consecutively, ETEND may

also go low in this case for the refresh cycle.

Activation Source Acceptance

Enabling Interrupt Requests when IRF = 1 in EDMDR

ETEND Pin and CBR Refresh Cycle

Rev.7.00 Mar. 18, 2009 page 423 of 1136

Section 8 EXDMA Controller (EXDMAC)

REJ09B0109-0700