M34551M4 datasheet(35/68 Pages) MITSUBISHI

Part #	M34551M4

Description	SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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35 / 68 page

35

MITSUBISHI MICROCOMPUTERS

4551 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for

INFRARED REMOTE CONTROL TRANSMITTER

(8) State transition

State transition is described using Figure 36.

Fig. 36 State transition

B

C

D

K

A

F

G

H

E

MR3

← 1

MR3

← 0

MR3

← 1

MR3

← 0

MR3

← 1

MR3

← 0

MR3

← 1

MR3

← 0

(Note 2)

J

f(XIN):Stop

f(XCIN) :

Oscillation

I

(Stabilizing

time

c )

(Stabilizing

time

c )

(Stabilizing

time

d ) (Stabilizing

time

d )

B

, F

C

, G

D

, H

B

, F

C

, G

D

, H

A

, E

A

, E

B

, F

C

, G

D

, H

B

, F

C

, G

D

, H

A

, E

(Note 2)

Reset

POF execution

Return input 1

(Stabilizing time a )

POF execution

Return input 1, 2

(Stabilizing time a )

POF execution

Return input 1, 2

(Stabilizing time c )

(Note 1)

Clock

operating

mode

POF execution

Return input 1, 2

(Stabilizing time c )

(Note 1)

f(XIN):Stop

f(XCIN):Stop

Clock

operating

mode

f(XIN):Oscillation

f(XCIN):Stop

System clock;

f(XIN)/4

MR=(10002)

f(XIN):Oscillation

f(XCIN):Oscillation

f(XIN):Oscillation

f(XCIN):Oscillation

f(XIN):Stop

f(XCIN):Oscillation

System clock;

f(XIN)/4

MR=(11002)

System clock;

f(XCIN)/4

MR=(11012)

System clock;

f(XCIN)/4

MR=(11112)

f(XIN):Oscillation

f(XCIN):Stop

System clock;

f(XIN)

MR=(00002)

f(XIN):Oscillation

f(XCIN):Oscillation

System clock;

f(XIN)

MR=(01002)

f(XIN):Oscillation

f(XCIN):Oscillation

System clock;

f(XCIN)

MR=(01012)

f(XIN):Stop

f(XCIN):Oscillation

System clock;

f(XCIN)

MR=(01112)

(Note 2)

POF2 execution

Return input 1

(Stabilizing time a )

POF2 execution

Return input 1

(Stabilizing time a )

POF2 execution

Return input 1

(Stabilizing time b )

POF2 execution

Return input 1

(Stabilizing time b )

f(XIN):Stop

f(XCIN):Stop

RAM

back-up

mode

Stabilizing time a : An interval required to stabilize the f(XIN) oscillation is automatically generated by hardware.

Stabilizing time b : An interval required to stabilize the f(XCIN) oscillation is automatically generated by hardware.

Stabilizing time c : Generate an interval required to stabilize the f(XIN) oscillation in state C or G by software at the

transition D

→C, D→G, H→C, H→G, J→C, or J→G.

Stabilizing time d : Generate an interval required to stabilize the f(XCIN) oscillation in state B, F by software at the

transition A

→B, E→F, A→F, or E→B.

Return input 1: External wakeup signal (P00–P03, P10–P13)

Return input 2: Timer 2 interrupt request flag

Notes 1. MR3=“1”

→The microcomputer starts its operation after counting f(XCIN) clock signal 59 to 70 times.

MR3=“0”

→The microcomputer starts its operation after counting f(XCIN) clock signal 32 to 43 times.

2. When the following 2 conditions are satisfied, the transition A

→E, B→F, A→F, C→F, G→F represented

by “

” can be executed.

(1) VDD = 2.2 V to 5.5 V (One Time PROM version: VDD = 2.5 V to 5.5 V), f(XIN)

≤ 1.0 MHz

(2) VDD = 4.5 V to 5.5 V, f(XIN)

≤ 2.0 MHz

A

, E

MR

2 ←

0

MR

3 ←

0

MR

2 ←

1

MR

3 ←

1

(Note 2)

MR

2

←

1

MR

2

←

0

MR

3

←

0

MR

3

←

1

MR

3

←

1

MR

0

←

0

MR

3

←

0

MR

0

←

1

MR

0 ←

1

MR

0 ←

0

MR

3 ←

1

MR

3 ←

0

MR

3

←

1

MR

1

←

0

MR

3

←

0

MR

1

←

1

MR

1 ←

0

MR

3 ←

0

MR

1 ←

1

MR

3 ←

1

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M34551M4 Datasheet(PDF) 35 Page - Mitsubishi Electric Semiconductor

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