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HD64570 Datasheet, PDF (72/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor
Normal
operating
mode
Reset
mode
RESET = 0
System
stop
mode
Note: IOSTP is bit 0 in the low power register (LPR).
Figure 3.1 Chip Operating Mode Transitions
Table 3.1 indicates the operational status of the main functional modules in each of the operating
modes.
Table 3.1 Operational Status of On-Chip Functional Modules in Operating Modes
Operating Mode
Reset mode
Normal operating mode
System stop mode
Note: °: operation enabled
: operation disabled
On-Chip DMAC

°

Functional Module
MSCI
Timers


°
°


3.2.2 Low-Power Register (LPR)
The low-power register controls transition to system stop mode.
Rev. 0, 07/98, page 56 of 453