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Section 2 CPU
Rev. 6.00 Sep 12, 2006 page 48 of 526
REJ09B0326-0600
Reset state
Program halt state
Exception-handling state
Program execution state
Reset cleared
SLEEP instruction executed
Reset
occurs
Interrupt
source
Reset
occurs
Exception-
handling
request
Exception-
handling
complete
Reset occurs
Figure 2.15 State Transitions
2.7.2
Program Execution State
In the program execution state the CPU executes program instructions in sequence.
There are three modes in this state, two active modes (high speed and medium speed) and one
subactive mode. Operation is synchronized with the system clock in active mode (high speed and
medium speed), and with the subclock in subactive mode. See section 5, Power-Down Modes for
details on these modes.
2.7.3
Program Halt State
In the program halt state there are five modes: two sleep modes (high speed and medium speed),
standby mode, watch mode, and subsleep mode. See section 5, Power-Down Modes for details on
these modes.
2.7.4 Exception-Handling
State
The exception-handling state is a transient state occurring when exception handling is started by a
reset or interrupt and the CPU changes its normal processing flow. In exception handling caused
by an interrupt, SP (R7) is referenced and the PC and CCR values are saved on the stack.
For details on interrupt handling, see section 3.3, Interrupts.
Summary of Contents for F-ZTAT H8/3642A Series
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Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
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Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...