NT6862 View Datasheet(PDF) - Novatek Microelectronics

Part Name

Description

Manufacturer

NT6862

8-Bit Microcontroller for Monitor

Novatek Microelectronics 

NT6862-5xxxx

3. RAM: 512 X 8 bits

The built-in 512 X 8-bit SRAM is used for data memory and stack area. The RAM addressing range is from $0080 to $027F.

The contents of RAM are undetermined at power-up and are not affected by system reset. Software programmers can

allocate stack area in the RAM by setting stack pointer register (S). Because the 6502 default stack pointer is $01FF,

programmers must set S register to FFH when starting the program.

as; LDX #$FF

TXS

$0000

$003D

$0080

$01FF

System Registers

Unused

RAM

( 512 Bytes )

stack pointer

$027F

$0280

Unused

$7FFF

$8000

( 32 K Bytes )

ROM

$FFFA

$FFFB

$FFFC

$FFFD

$FFFE

$FFFF

NMI-L

NMI-H

RST-L

RST-H

IRQ-L

IRQ-H

NMI vector

RESET vector

IRQ vector

4. ROM: 32K X 8 bits

NT6862 provides maximum 32K ROM space for code. The ROM space is located from $8000 to $FFFF.

The addresses, from $FFFA to $FFFF, are reserved for the 6502 CPU vectors, thus users must arrange them sepately.

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