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7721 Datasheet(PDF) 448 Page - Renesas Technology Corp |
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7721 Datasheet(HTML) 448 Page - Renesas Technology Corp |
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448 / 577 page  APPLICATION 7721 Group User’s Manual 16–45 16.2 Examples of using DMA controller (2) Initial setting example for relevant register b7 b0 Port P4 register (Address A16) P43 output : H level 1 TA3OUT output : H level (D-F/F initialized) b7 b0 1 b7 b0 P43 : Output mode 1 b7 b0 b7 b0 DMAREQ0 pin : Input mode 0 b7 b0 Transfer source Wait Transfer destination Wait Single transfer mode ! 0 000000 ! : It may be “0” or “1.” b7 b0 DMA0 mode register L (Address 1FCC16) Transfer unit : 8 bits 2-bus cycle transfer Cycle-steal transfer mode Transfer source address direction : Fixed Transfer destination address direction : Forward 0 1 010001 TA2IN pin : Input mode 1 00 Port P5 register (Address B16) Port P4 direction register (Address C16) Port P5 direction register (Address D16) TA3IN pin : Input mode TA3OUT pin : Output mode (D–F/F initialized) Port P9 direction register (Address 1516) DMA0 mode register H (Address 1FCD16) Fig. 16.2.3 Initial setting example for relevant register (1) |
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