CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U19014EJ1V0UD
33
3.1.1 Internal program memory space
The internal program memory space stores the program and table data. Normally, it is addressed with the program
counter (PC).
The
µ
PD78F0730 incorporates internal ROM (flash memory), as shown below.
Table 3-3. Internal ROM Capacity
Internal ROM
Part Number
Structure Capacity
µ
PD78F0730 Flash
memory
16,384
×
8 bits (0000H to 3FFFH)
The internal program memory space is divided into the following areas.
(1) Vector table area
The 64-byte area 0000H to 003FH is reserved as a vector table area. The program start addresses for branch
upon reset or generation of each interrupt request are stored in the vector table area.
Of the 16-bit address, the lower 8 bits are stored at even addresses and the higher 8 bits are stored at odd
addresses.
Table 3-4. Vector Table
Vector Table Address
Interrupt Source
Vector Table Address
Interrupt Source
0000H
RESET input, POC, LVI, WDT
0018H
INTCSI10
0004H INTLVI
001AH INTTMH1
0006H INTP0
001CH INTUSB2
0008H INTP1
001EH INTTM50
000AH INTP2
0020H INTTM000
000CH INTP3
0022H INTTM010
000EH INTUSB0
0024H INTRSUM
0010H INTUSB1
002AH INTTM51
0012H INTSRE6
003EH BRK
0014H INTSR6
0016H INTST6
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