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CHAPTER 5 CPU ARCHITECTURE
5.1.1 Internal program memory space
The
µ
PD78056F and
µ
PD78056FY are Mask ROM with a 49152 x 8 bit configuration, the
µ
PD78058F and
µ
PD78058FY are Mask ROM with a 61440 x 8 bit configuration and the
µ
PD78P058F and
µ
PD78P058FY are PROM
with a 61440 x 8 bit configuration. They store program and table data, etc. Normally, they are addressed by the
program counter (PC).
The areas shown below are allocated to the internal program memory space.
(1) Vector table area
The 64-byte area 0000H to 003FH is reserved as a vector table area. The RESET input and program start
addresses for branch upon generation of each interrupt request are stored in the vector table area. Of the
16-bit address, low-order 8 bits are stored at even addresses and high-order 8 bits are stored at odd addresses.
Table 5-1. Vector Table
Vector Table Address Interrupt Sources
0000H RESET input
0004H INTWDT
0006H INTP0
0008H INTP1
000AH INTP2
000CH INTP3
000EH INTP4
0010H INTP5
0012H INTP6
0014H INTCSI0
0016H INTCSI1
0018H INTSER
001AH INTSR/INTCSI2
001CH INTST
001EH INTTM3
0020H INTTM00
0022H INTTM01
0024H INTTM1
0026H INTTM2
0028H INTAD
003EH BRK