HD64336901G Renesas Technology, HD64336901G Datasheet - Page 117

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

6.2
Figure 6.1 shows the possible transitions among these operating modes. A transition is made from
the program execution state to the program halt state of the program by executing a SLEEP
instruction. Interrupts allow for returning from the program halt state to the program execution
state of the program. A direct transition from active mode to active mode changes the operating
frequency. RES input enables transitions from a mode to the reset state. Table 6.2 shows the
transition conditions of each mode after the SLEEP instruction is executed and a mode to return by
an interrupt. Table 6.3 shows the internal states of the LSI in each mode.
Table 6.2
[Legend]
X:
Note:
DTON
0
1
Notes: 1. To make a transition to another mode by an interrupt, make sure interrupt handling is after the interrupt
Don’t care
* When a state transition is performed while SMSEL is 1, timer V, SCI3, and the A/D
Program halt state
Standby mode
Mode Transitions and States of LSI
Reset state
2. Details on the mode transition conditions are given in table 6.2.
converter are reset, and all registers are set to their initial values. To use these
functions after entering active mode, reset the registers.
SSBY
0
0
1
X
Transition Mode after SLEEP Instruction Execution and Interrupt Handling
is accepted.
SMSEL
0
1
X
0*
SLEEP
instruction
Interrupt
Figure 6.1 Mode Transition Diagram
Transition Mode after SLEEP
Instruction Execution
Sleep mode
Subsleep mode
Standby mode
Active mode (direct transition) —
Program execution state
Active mode
Direct transition
interrupt
Interrupt
SLEEP
instruction
Interrupt
SLEEP
instruction
Rev. 1.00, 11/03, page 89 of 376
Transition Mode due to
Interrupt
Active mode
Active mode
Active mode
Program halt state
Subsleep mode
Sleep mode