HD404669 Datasheet, PDF (10/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 Series
Memory Map
ROM Memory Map
The ROM memory map is shown in figure 1 and described below.
ROM address
$0000
$000F
$0010
$003F
$0040
$0FFF
$1000
$1FFF
$2000
$2FFF
$3000
$3FFF
Vector addresses
(16 words)
Zero page subroutine
area (64 words)
Pattern area (4,096 words)
HD404668/HD40A4668
program area (8,192 word)
HD4046612/HD40A46612
program area (12,288 words)
HD404669/HD40A4669/
HCD404669/HD407A4669
program area (16,384 words)
ROM address
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
JMPL instruction
(Jump to reset, stop mode clearance
routine)
JMPL instruction
(Jump to INT₀ interrupt handling
routine)
JMPL instruction
(Jump to INT₁ interrupt handling
routine)
JMPL instruction
(Jump to timer A interrupt handling
routine)
$0008
$0009
$000A
$000B
JMPL instruction
(Jump to INT₂ interrupt handling
routine)
JMPL instruction
(Jump to timer C, INT₃ interrupt
handling routine)
$000C
$000D
JMPL instruction
(Jump to timer D, INT₄ interrupt
handling routine)
$000E JMPL instruction
$000F ^{(Jump to serial 1 routine)}
Figure 1 ROM Memory Map
Vector Address Area ($0000–$000F): Reserved for JMPL instructions that branch to the start addresses
of the reset and interrupt routines. After MCU reset or an interrupt, program execution continues from the
vector address.
Zero-Page Subroutine Area ($0000–$003F): Reserved for subroutines. The program branches to a
subroutine in this area in response to the CAL instruction.
Pattern Area ($0000–$0FFF): Contains ROM data that can be referenced with the P instruction.
Program Area ($0000–$1FFF: HD404668, HD40A4668; $0000–$2FFF: HD4046612, HD40A46612;
$0000–$3FFF: HD404669, HD40A4669, HD407A4669, HCD404669): Used for program coding.
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