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State transition diagram – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 8 Device State Transition

3.State Transition Diagram

3. State Transition Diagram

This section describes state transition.

Figure 3-1 State Transition of MB91460 Series

Oscillation-

stabilization-

wait reset

Power-on

Setting initialization

(INIT)

Program reset

(RST)

Main RUN

Main sleep

Oscillation-

stabilization-wait RUN

Main stop

Sub-RUN

Sub-sleep

Oscillation-

stabilization-wait RUN

Program reset

(RST)

Sub-stop *

1

2

3

4

4

5

5

6

7

13

7

8

8

9

9

3

3

10

11

1

1

1

1

1

1

1

1

1

1

1

Main clock mode

Subclock mode

1

INIT pin = 0 (INIT)

2

INIT pin = 1 (Cancel of INIT)

3

Termination of oscillation-stabilization wait

4

Cancel of reset (RST)

5

Software reset (RST)

6

Sleep (Writing instruction)

7

Stop (Writing instruction)

8

Interrupt

9

External interrupt requiring no clock

10

Switching from main to sub (Writing instruction)

11

Switching from sub to main (Writing instruction)

12

Watchdog reset (INIT)

13

Sub-sleep (Writing instruction)

Priority of transition request

Highest

priority

Setting-initialization reset (INIT)
Termination of oscillation-stabilization wait
Operation-initialization reset (RST)
Interrupt request
Stop

Lowest

priority

Sleep

12

12

* To switch clock source between main and sub, in the RUN status where switched clock is stable,
switch clock source register (CLKR) between bit 1 and 0 (CLKS1 and CLKS0 bit).

MB91460 does not stop

oscillation while waiting

time is generated.