HD4074344 Datasheet, PDF (15/100 Pages) Hitachi Semiconductor – 4-bit microcomputers

HD404344R Series/HD404394 Series
Vector Address Area ($0000 to $000F): When an MCU reset or an interrupt process is executed, the
program will begin executing from a vector address. The JMPL instructions which branch to the reset
routine and interrupt routine should be programmed at these top addresses.
Zero-Page Subroutine Area ($0000–$003F): This area is reserved for subroutines. The program branches
to a subroutine in this area in response to a CAL instruction.
Pattern Area:
HD404341R, HD40C4341R, HD404391—$0000 to $03FF
HD404342R, HD40C4342R, HD404392—$0000 to $07FF
HD404344R, HD40C4344R, HCD404344R, HCD40C4344R, HD404394, HD4074344, HD4074394—
$0000 to $0FFF
This area contains ROM data which can be referenced with the P instruction.
Program Area:
HD404341R, HD40C4341R, HD404391—$0000 to $03FF
HD404342R, HD40C4342R, HD404392—$0000 to $07FF
HD404344R, HD40C4344R, HCD404344R, HCD40C4344R, HD404394, HD4074344, HD4074394—
$0000 to $0FFF
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