UPD6P9 datasheet(55/73 Pages) RENESAS

55 / 73 page

µPD67, 67A, 68, 68A, 69

Data Sheet U14935EJ2V1DS

STTS R0n

<1> Instruction code:

0 00110 R3 R2 R1 R0

<2> Cycle count:

<3> Function:

if statuses match

← 1

else

← 0n = 0 to F

Compares the S0, S1, KI/O, KI, and TIMER statuses with the register R0n contents. If at least one of the

statuses matches the bits that have been set, the status flag F is set (to 1).

If none of them match, the status flag F is cleared (to 0).

STTS #data4

<1> Instruction code:

0 00111000 1

0 00000 d3 d2 d1 d0

<2> Cycle count:

<3> Function:

if statuses match

← 1

else

← 0

Compares the S0, S1, S2, KI/O, KI, and TIMER statuses with the immediate data contents. If at least one

of the statuses matches the bits that have been set, the status flag F is set (to 1).

If none of them match, the status flag F is cleared (to 0).

SCAF (Set Carry If ACC = FH)

<1> Instruction code:

1 10101001 1

<2> Cycle count:

<3> Function:

A = 0FH

← 1

else

← 0

Sets the carry flag CY (to 1) if the accumulator contents are FH.

The accumulator values after executing the SCAF instruction are as follows:

Accumulator Value

Carry Flag

Before Execution

After Execution

×××0

0000

0 (clear)

××01

0001

0 (clear)

×011

0011

0 (clear)

0111

0 (clear)

1111

1 (set)

Remark

×: don’t care

NOP

<1> Instruction code:

0 00000000 0

<2> Cycle count:

<3> Function:

← PC + 1

No operation

UPD6P9 Datasheet(PDF) 55 Page - Renesas Technology Corp

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