NT68P62-01 Datasheet, PDF (9/56 Pages) List of Unclassifed Manufacturers – 8-Bit Microcontroller for Monitor (32K OTP ROM Type)

NT68P62-01
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 )
OTP
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
NT68P62 provides 32K ROM space for programming. 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 by
themselves.
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