UPD77019-013 NEC, UPD77019-013 Datasheet - Page 20

• Manufacturer Part Number: UPD77019-013
• Description: 16 bits/ Fixed-point Digital Signal Processor
• Manufacturer: NEC

20
2.4.1 Instruction RAM Outline
and rewritten by boot program.
The PD77019-013 has an instruction RAM (4K words
A system vector area is assigned to 64 words of the instruction RAM. Internal instruction RAM is initialized
Boot up ROM contains the program loading instruction code to internal instruction RAM.
Caution
When any data is accessed or stored to system address, normal operation of the device is
not assured.
0
0
0
0
0
0
0
0
0
0
x
x
x
x
x
x
x
x
x
x
F
1
1
0
0
0
0
0
0
0
F
2
1
2
2
2
1
1
0
0
F
0
F
4
3
0
F
0
F
0
F
0
F
0
F
0
F
0
F
0
Bootup ROM (256 words)
Preliminary Data Sheet
Internal Instruction RAM
System (61 K words)
System (256 words)
Vector (64 words)
PD77019-013
(4 K words)
32 bits).
PD77019-013