UPD750064CU datasheet(53/82 Pages) NEC

53 / 82 page

µPD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)

Data Sheet U10165EJ2V0DS00

Instruction

Number

Addressing

Mnemonic

Operand

of Machine

Operation

Skip Condition

Group

of Bytes

Cycles

Area

Subroutine

RETINote 1

µPD750064

stack control

MBE, RBE, 0, 0

← (SP+1)

PC11–0

← (SP) (SP+3) (SP+2)

PSW

← (SP+4) (SP+5), SP ← SP+6

µPD750066, 750068

MBE, RBE, 0, PC12

← (SP+1)

PC11–0

← (SP) (SP+3) (SP+2)

PSW

← (SP+4) (SP+5), SP ← SP+6

µPD750064

0, 0, 0, 0

← (SP+1)

PC11–0

← (SP) (SP+3) (SP+2)

PSW

← (SP+4) (SP+5), SP ← SP+6

µPD750066, 750068

0, 0, 0, PC12

← (SP+1)

PC11–0

← (SP) (SP+3) (SP+2)

PSW

← (SP+4) (SP+5), SP ← SP+6

PUSH

(SP–1)(SP–2)

← rp, SP ← SP–2

(SP–1)

← MBS, (SP–2) ← RBS, SP ← SP–2

POP

← (SP+1) (SP), SP ← SP+2

MBS

← (SP+1), RBS ← (SP), SP ← SP+2

Interrupt

IME (IPS.3)

← 1

control

×××

××× ← 1

IME (IPS.3)

← 0

×××

××× ← 0

Input/output

INNote 2

A, PORTn

← PORTn

(n = 0-6, 11)

XA, PORTn

← PORTn+1, PORTn

(n = 4)

OUTNote 2

PORTn, A

PORTn

← A

(n = 2-6)

PORTn, XA

PORTn+1, PORTn

← XA

(n = 4)

CPU control

HALT

Set HALT Mode (PCC.2

← 1)

STOP

Set STOP Mode (PCC.3

← 1)

NOP

No Operation

Special

SEL

RBn

RBS

← n

(n = 0-3)

MBn

MBS

← n

(n = 0, 1, 15)

Notes 1.

The operations indicated with thick lines can be performed only in the Mk II mode. The other operations

can be performed only in the Mk I mode.

While the IN instruction and OUT instruction are being executed, the MBE must be set to 0 or 1, and

MBS must be set to 15.

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