UPD17933 datasheet(21/252 Pages) NEC

No. de pieza	UPD17933

Descripción Electrónicos	4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

PDF	252 Pages

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Fabricante Electrónico	NEC [NEC]

Página de inicio	http://www.nec.com/

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µPD17933, 17934

2.2 Program Memory

Figure 2-2 shows the configuration of the program memory.

As shown in this figure, the program memory consists of:

µPD17933: 6144 × 16 bits (0000H-17FFH)

µPD17934: 8192 × 16 bits (0000H-1FFFH)

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

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

( PD17933)

Reset start address

Serial interface 1 interrupt vector

Basic timer 1 interrupt vector

Timer 0 interrupt vector

INT pin interrupt vector

Page 0

Page 1

Page 2

Page 3

CALL addr

instruction

subroutine

entry address

( PD17934)

UPD17933 Datasheet(PDF) 21 Page - NEC