參數(shù)資料
型號: NT68P61A
廠商: Electronic Theatre Controls, Inc.
英文描述: 8-Bit Microcontroller for Monitor (24K OTP ROM Type)
中文描述: 8位微控制器的監(jiān)視器(足金檢察官辦公室光盤形式)
文件頁數(shù): 13/48頁
文件大?。?/td> 1057K
代理商: NT68P61A
NT68P61A
13
4. 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
RAM
Unused
$0000
$0080
$0100
$00FF
$A000
$FFFF
stack pointer
$FFFE
$FFFD
$FFFC
RST-L
RST-H
IRQ-L
IRQ-H
RESET vector
IRQ vector
$017F
$0180
EDID
(24K Bytes)
OTP
ROM
$0025
System Registers
Unused
$BFFF
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