Hardware manual

Microcomputer Technical Q&A
83
Q&A No.: QAH8S-210
Category: DMAC
Subject: Bus Right in Standby State
Question
In the DMAC full address mode and external request mode, a standby state may be entered after a
DMAC write. What happens to the bus right during this period?
Answer
The DMAC releases the bus right in the standby state, and so the bus is transferred to the CPU,
refresh controller, etc.
Applicable Products
Applicability Series Applicability Series Applicability Series
Entire H8S Series Yes H8S/2655 Yes H8S/2350
H8S/2355 Yes H8S/2357 H8S/2345
H8S/2245 H8S/2148 H8S/2144
H8S/2138 H8S/2134 H8S/2128
H8S/2124 — — — —