UPD780964 Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD780964

8-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD780016Y, 780018Y

4. MEMORY SPACE

The memory map of the µPD780016Y and 780018Y is shown in Figure 4-1.

Figure 4-1. Memory Map

FFFFH

Special function registers

(SFR) 256 × 8 bits

FF00H

FEFFH

General-purpose registers

FEE0H

32 × 8 bits

FEDFH

Data

memory

space

FB00H

FAFFH

FAE0H

FADFH

FAC0H

FABFH

F800H

F7FFH

F400H

F3FFH

Program nnnnH+1

memory nnnnH

space

Internal high-speed RAM

1024 × 8 bits

Use prohibited

Buffer RAM

32 × 8 bits

Use prohibited

Internal extended RAM

1024 × 8 bits

Use prohibited Note 1

Internal ROM Note 2

0000H

nnnnH

1000H

0FFFH

0800H

07FFH

0080H

007FH

0040H

003FH

0000H

Program area

CALLF entry area

Program area

CALLT table area

Vector table area

Notes 1. If external device expansion functions are to be employed for the µPD780018Y, set the size of the

internal ROM to below 56K bytes using the memory size switching register (IMS).

2. The internal ROM capacity depends on the product. (See the following table.)

Part Number

µPD780016Y

µPD780018Y

Internal ROM Last Address

nnnnH

BFFFH

EFFFH

16

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