NT6861U View Datasheet(PDF) - Novatek Microelectronics

Part Name

Description

Manufacturer

NT6861U

8-Bit Microcontroller for Monitor

Novatek Microelectronics 

Instruction set list (continued)

Instruction Code

JMP

Meaning

Jump to new location

JSR

Jump to subroutine

LDA

Load accumulator with memory

LDX

Load Index register X with memory

LDY

Load Index register Y with memory

LSR

NOP

Shift right one bit

No operation

ORA

Logical OR

PHA

PHP

Push accumulator on stack

Push status register on stack

PLA

Pull accumulator from stack

PLP

ROL

Pull status register from stack

Rotate left through carry

ROR

Rotate right through carry

RTI

RTS

Return from interrupt

Return from subroutine

SBC

Subtract with borrow

SEC

SED

Set carry

Set decimal mode

SEI

Set interrupt disable status

STA

Store accumulator in memory

STX

Store index register X in memory

STY

Store index register Y in memory

TAX

Transfer accumulator to index X

TAY

Transfer accumulator to index Y

TSX

Transfer stack pointer to index X

TXA

Transfer index X to accumulator

TXS

Transfer index X to stack Pointer

TYA

Transfer index Y to accumulator

* Refer to 6502 programming data book for more details.

7

NT6861

Operation

(PC+1) → PCL, (PC+2) → PCH

PC + 2 ↓, (P+1) → PCL, (PC+2) → PCH

M→ A

M→ X

M→ Y

0 → M7 • • • M0 → C

No operation (2 cycles)

A+M →A

A↓

P↓

A↑

P↑

C ← M7 • • • M0 ← C

C → M7 • • • M0 → C

P ↑, PC ↑

PC ↑, PC+1 → PC

A − M − C → A, C

1→C

1→D

1→I

A →M

X →M

Y →M

A→ X

A→ Y

S→ X

X→ A

X→ S

Y→ A

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