UPD17708 datasheet(27/358 Pages) RENESAS

27 / 358 page

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

BR addr

instruction

branch

address

BR @AR instruction

branch address

CALL @AR instruction

subroutine entry address

MOVT DBF, @AR instruction

table reference address

Address

( 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)

( PD17704)

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