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UPD17708 Datasheet(PDF) 25 Page - NEC

No. de pieza UPD17708
Descripción Electrónicos  4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM
PDF  356 Pages
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Fabricante Electrónico  NEC [NEC]
Página de inicio  http://www.nec.com/
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UPD17708 Datasheet(HTML) 25 Page - NEC

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µPD17704, 17705, 17707, 17708, 17709
2.2 Program Memory
Figure 2-2 shows the configuration of the program memory.
As shown in this figure, the
µPD17704 has 16K bytes (8192 × 16 bits) of program memory, the µPD17707
has 24K bytes (12288
× 16 bits), and the
µPD17708 and 17709 have 32K bytes (16384 × 16 bits).
Therefore, the program memory addresses of the
µPD17704 are 0000H through 1FFFH, those of the
µPD17705, 17707 are 0000H through 2FFFH, and those of the µPD17708 and 17709 are 0000H through 3FFFH.
Because all “instructions” are “one-word instructions”, one instruction can be stored to one address of the
program memory.
As constant data, the contents of the program memory are read to the data buffer by using a table reference
instruction.
Figure 2-2. Configuration of Program Memory
( PD17708, 17709)
16 bits
H
H
BR addr
instruction
branch
address
BR @AR instruction
branch address
CALL @AR instruction
subroutine entry address
MOVT DBF, @AR instruction
table reference address
Address
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
( PD17705, 17707)
Reset start address
Serial interface 1 interrupt vector
Serial interface 0 interrupt vector
Timer 3 interrupt vector
Timer 2 interrupt vector
Timer 1 interrupt vector
Timer 0 interrupt vector
INT4 pin interrupt vector
INT3 pin interrupt vector
INT2 pin interrupt vector
INT1 pin interrupt vector
INT0 pin interrupt vector
Falling edge interrupt vector of CE pin
Segment 0
Page 0
Page 1
Page 2
Page 3
Page 0
Page 1
Page 2
Page 3
CALL addr
instruction
subroutine
entry address
CALL addr
instruction
subroutine
entry address
BR addr
instruction
branch
address
Segment 1
(system
segment)
0
F
1
2
3
4
5
6
7
8
9
A
B
C
F
F
F
F
0
F
0
F
0
0
0
0
0
0
0
0
0
0
0
0
F
F
F
F
0
F
0
F
0
0
0
0
0
0
0
0
0
0
0
0
7
F
7
F
0
F
0
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
2
2
µ
µ
( PD17704)
µ



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