UPD17016 Datasheet, PDF (25/324 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17016, 17017
2.2 Program Memory
Figure 2-2 shows the configuration of the program memory.
As shown in this figure, the program memory is configured as follows:
µPD17016: 3836 × 16 bits (0000H through 0EFBH)
µPD17017: 7932 × 16 bits (0000H through 1EFBH)
All “instructions” are “1-word instructions” 16 bits long, so that one instruction can be stored in one address
of the program memory.
Constant data reads the contents of the program memory to the data buffer by using a table reference
instruction.
Figure 2-2. Configuration of Program Memory
Address
0 0 0 0 H Reset start address
0001H
0002H
0 0 0 3 H Timer interrupt vector
0004H
0 0 0 5 H INT0 pin interrupt vector
00FFH
07FFH
(with µPD17016)
(with µPD17017)
BR addr instruction
branch address^Note
Page 0
CALL addr
instruction
subroutine
entry address
BR @AR instruction
branch address
CALL @AR instruction
subroutine entry
address
BR addr instruction
branch address
BR @AR instruction
branch address
CALL @AR instruction
MOVT DBF, @AR instruction _{subroutine entry}
table reference address
address
MOVT DBF, @AR instruction
table reference address
0EFBH
(with µPD17016)
Page 1
0FFFH
17FFH
Page 2
1EFBH
(with µPD17017)
16 bits
Page 3
Note Valid in the address 0000H through 0EFBH.
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