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D17133CS Datasheet

  • D17133CS

  • 4-BIT SINGLE-CHIP MICROCONTROLLER

  • 1138.87KB

  • 289頁(yè)

  • NEC   NEC

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CHAPTER 4 PROGRAM MEMORY (ROM)
The program configuration of the
PD17120 subseries is as follows.
Product Name
Program Memory Capacity
1.5K bytes (768
16 bits)
Program Memory Address
0000H-02FFH
PD17120
PD17121
PD17132
PD17133
PD17P132
PD17P133
2K bytes (1024
16 bits)
0000H-03FFH
Program memory stores the program, and the constant data table. The top of the program memory is allocated
to the reset start address and the interrupted vector address. The program memory address is specified by the
program counter.
4.1 PROGRAM MEMORY CONFIGURATION
Figure 4-1 shows the program memory map. Branch instructions, subroutine calls, and table references can
specify any address in program memory (0000H - 07FFH).
Figure 4-1. Program Memory Map for the
PD17120 Subseries
Address
0000H
16 bits
Reset start address
Subroutine entry
address for the CALL
addr instruction
Branch address for
the BR addr instruction
0001H
Serial interface interrupt vector
0002H
Timer interrupt vector
Branch address for
the BR @AR instruction
0003H
External (INT) interrupt vector
(
PD17120/17121)
02FFH
Subroutine entry
address for the CALL
@AR instruction
Table reference address
for the MOVT DBF,
@AR instruction
(
PD17132/17133/17P132/17P133)
03FFH
23

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