D78F9189CT View Datasheet(PDF) - NEC => Renesas Technology
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D78F9189CT Datasheet PDF : 247 Pages
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CHAPTER 3 CPU ARCHITECTURE
3.1.1 Internal program memory space
The internal program memory space stores programs and table data. This space is usually addressed by the
program counter (PC).
The µPD789188 and 78F9189 Subseries provide the following internal ROMs (or flash memory) containing the
following capacities.
µPD789188
µPD78F9189
Part Number
Table 3-1. Internal ROM Capacity
Structure
Mask ROM
Flash memory
Internal ROM
Capacity
16,384 × 8 bits
24,576 × 8 bits
The following areas are allocated to the internal program memory space:
(1) Vector table area
A 36-byte area of addresses 0000H to 0023H is reserved as a vector table area. This area stores program
start addresses to be used when branching by the RESET input or an interrupt request generation. Of a
16-bit program address, the lower 8 bits are stored in an even address, and the higher 8 bits are stored in
an odd address.
Vector Table Address
0000H
0004H
0006H
0008H
000AH
000CH
000EH
0010H
0012H
Table 3-2. Vector Table
Interrupt Request
RESET input
INTWDT
INTP0
INTP1
INTP2
INTP3
INTSR20/INTCSI20
INTST20
INTWT
Vector Table Address
0014H
0016H
0018H
001AH
001CH
001EH
0020H
0022H
Interrupt Request
INTWTI
INTTM80
INTTM81
INTTM82
INTTM90
-
-
INTAD0
Note
(2) CALLT instruction table area
In a 64-byte area of addresses 0040H to 007FH, the subroutine entry address of a 1-byte call instruction
(CALLT) can be stored.
32
User’s Manual 2nd edition
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