NT6861U View Datasheet(PDF) - Novatek Microelectronics

Part Name

Description

Manufacturer

NT6861U

8-Bit Microcontroller for Monitor

Novatek Microelectronics 

NT6861

3. RAM: 256 X 8 bits

256 X 8-bit SRAM is used for data memory and stack. The RAM addressing range is from $0080 to $017F. From $0100 to

$017F is used as the EDID data buffer when activating DDC1/2B mode transmission. 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 register S to FFH when starting the

program, so the stack area will map $01FF - $0180 to $00FF - $0080.

as; LDX

TXS

#$FF

$0000

$0025

$0080

$00FF

$0100

System Registers

Unused

RAM

EDID

stack pointer

$017F

$0180

Unused

$BFFF

$A000

(4/8/12/16/24K Bytes)

ROM

$FFFC

$FFFD

$FFFE

$FFFF

RST-L

RST-H

IRQ-L

IRQ-H

RESET vector

IRQ vector

8

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