![Renesas H8SX series Hardware Manual Download Page 229](http://html1.mh-extra.com/html/renesas/h8sx-series/h8sx-series_hardware-manual_1440107229.webp)
Section 7 DMA Controller (DMAC)
Rev. 3.00 Mar. 14, 2006 Page 191 of 804
REJ09B0104-0300
7.4.11
Bus Cycles in Single Address Mode
(1)
Single Address Mode (Read and Cycle Stealing)
In single address mode, one byte, one word, or one longword of data is transferred at a single
transfer request and after the transfer the bus is released temporarily. One bus cycle or more by the
CPU are executed in the bus released cycles.
In figure 7.33, the
TEND
signal output is enabled and data is transferred in bytes from the external
8-bit 2-state access space to the external device in single address mode (read).
Bus
released
Bus
released
Bus
released
DMA read
cycle
DMA read
cycle
DMA read
cycle
DMA read
cycle
B
φ
Address bus
Bus
released
Bus
released
Last transfer
cycle
RD
TEND
DACK
Figure 7.33 Example of Transfer in Single Address Mode (Byte Read)
electronic components distributor