UPD784225YGK-XXX-9EU View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD784225YGK-XXX-9EU

16/8-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD784224, 784225, 784224Y, 784225Y

6. CPU ARCHITECTURE

6.1 Memory Space

A memory space of 1 Mbyte can be accessed. Mapping of the internal data area (special function registers and

internal RAM) can be specified the LOCATION instruction. The LOCATION instruction must be always executed

after RESET cancellation, and must not be used more than once.

(1) When LOCATION 0H instruction is executed

• Internal memory

The internal data area and internal ROM area are mapped as follows:

Part Number

µPD784224,

µPD784224Y

µPD784225,

µPD784225Y

Internal Data Area

0F100H to 0FFFFH

0EE00H to 0FFFFH

Internal ROM Area

00000H to 0F0FFH

10000H to 17FFFH

00000H to 0EDFFH

10000H to 1FFFFH

Caution The following areas that overlap the internal data area of the internal ROM cannot be used when

the LOCATION 0H instruction is executed.

Part Number

µPD784224,

µPD784224Y

µPD784225,

µPD784225Y

Unusable Area

0F100H to 0FFFFH (3,840 bytes)

0EE00H to 0FFFFH (4,608 bytes)

• External memory

The external memory is accessed in external memory expansion mode.

(2) When LOCATION 0FH instruction is executed

• Internal memory

The internal data area and internal ROM area are mapped as follows:

Part Number

µPD784224,

µPD784224Y

µPD784225,

µPD784225Y

Internal Data Area

FF100H to FFFFFH

Internal ROM Area

00000H to 17FFFH

FEE00H to FFFFFH

00000H to 1FFFFH

• External memory

The external memory is accessed in external memory expansion mode.

20

Data Sheet U12376EJ1V0DS00

Share Link: