M34280E1GP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M34280E1GP

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

4280 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

MACHINE INSTRUCTIONS (CONTINUED)

Parameter

Instruction code

Mnemonic

Hexadecimal

Type of

instructions

D8 D7 D6 D5 D4 D3 D2 D1 D0 notation

BM a

1 0 a6 a5 a4 a3 a2 a1 a0 1 a a 1

Function

1 (SK(SP)) ← (PC)

(SP) ← (SP) + 1

(PCH) ← 2

(PCL) ← a6–a0

BML p, a 0 0 1 1 1 p3 p2 p1 p0

1 0 a6 a5 a4 a3 a2 a1 a0

07 p 2

1aa

2 (SK(SP)) ← (PC)

(SP) ← (SP) + 1

(PCH) ← p

(PCL) ← a6–a0

(Note)

BMLA p, a 0 0 1 0 1 0 0 0 0

1 0 a6 a5 a4 p3 p2 p1 p0

05 0 2

1a p

2 (SK(SP)) ← (PC)

(SP) ← (SP) + 1

(PCH) ← p

(PCL) ← (a6–a4, A3–A0)

(Note)

RT

0 0 1 0 0 0 1 0 0 0 4 4 1 2 (PC) ← (SK(SP))

(SP) ← (SP) – 1

RTS

001000101

04 5 1

2 (PC) ← (SK(SP))

(SP) ← (SP) – 1

TAB1

001010111

0 5 7 1 1 (B) ← (T17–T14)

(A) ← (T13–T10)

T1AB

001000111

0 4 7 1 1 at timer 1 stop (V10=0)

(R17–R14) ← (B), (R13–R10) ← (A)

(T17–T14) ← (B), (T13–T10) ← (A)

at timer 1 operating (V10=1)

(R17–R14) ← (B), (R13–R10) ← (A)

TV1A

0 0 1 0 1 1 0 1 1 0 5 B 1 1 (V12–V10) ← (A2–A0)

SNZ1

001000010

0 4 2 1 1 (T1F) = 1 ?

After skipping the next instruction

(T1F) ← 0

TAC

0 0 1 0 0 0 0 0 0 0 4 0 1 1 (A2–A0) ← (C2–C0)

TCA

0 0 1 0 1 1 0 1 0 0 5 A 1 1 (C2–C0) ← (A2–A0), (CARR) ← 0

OCRA 0 1 0 0 0 0 1 1 0 0 8 6 1 1 (CARR) ← (A3)

Note : p is 0 to 7 for M34280E1, and p is 0 to 7 for M34280M1.

MITSUBISHI

32

ELECTRIC

MITSUBISHI MICROCOMPUTERS

4280 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

Skip condition

Detailed description

–

– Call the subroutine in page 2 : Calls the subroutine at address a in page 2.

–

– Call the subroutine : Calls the subroutine at address a in page p.

–

– Call the subroutine : Calls the subroutine at address (a6 a5 a4 A3 A2 A1 A0) determined by replacing the

low-order 4 bits of address a in page p with register A.

–

– Returns from subroutine to the routine called the subroutine.

Skip at uncondition – Returns from subroutine to the routine called the subroutine, and skips the next instruction at uncondition.

–

– Transfers the contents of timer 1 to registers A and B.

–

– Transfers the contents of registers A and B to timer 1.

–

(T1F) = 1

– Transfers the contents of register A to registers V1.

– Skips the next instruction when the contents of T1F flag is “1.”

After skipping, clears (0) to T1F flag.

–

– Transfers the contents of register A to register C.

–

– Transfers the contents of register C to register A. In this case, port CARR output latch is cleared to “0.”

–

– Transfers the contents of bit 3 (A3) of register A to port CARR output latch.

MITSUBISHI

ELECTRIC

33

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