Manualsbrain.com
  1. Manuals
  2. Brands
  3. NEC
  4. PD78076Y
  5. User Manual

NEC PD78076Y User Manual

Download
Page of 627
105
CHAPTER 5   CPU ARCHITECTURE
(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 5-2.  Vector Table
Vector Table Address
Interrupt Request
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
002AH
INTTM5
002CH
INTTM6
003EH
BRK
(2) CALLT instruction table area
The 64-byte area 0040H to 007FH can store the subroutine entry address of a 1-byte call instruction (CALLT).
(3) CALLF instruction entry area
The area 0800H to 0FFFH can perform a direct subroutine call with a 2-byte call instruction (CALLF).