UPD784038YGC-XXX-8BT データシートの表示（PDF） - NEC => Renesas Technology

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UPD784038YGC-XXX-8BT

16-/8-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD784035Y, 784036Y, 784037Y, 784038Y

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 0 instruction is executed

• Internal memory

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

Part Number

µPD784035Y

µPD784036Y

µPD784037Y

µPD784038Y

Internal Data Area

0F700H-0FFFFH

0F100H-0FFFFH

0EE00H-0FFFFH

Internal ROM Area

00000H-0BFFFH

00000H-0F6FFH

00000H-0F0FFH

10000H-17FFFH

00000H-0FDFFH

10000H-1FFFFH

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

the LOCATION 0 instruction is executed.

Part Number

µPD784035Y

µPD784036Y

µPD784037Y

µPD784038Y

Unusable Area

–

0F700H-0FFFFH (2304 Bytes)

0F100H-0FFFFH (3840 Bytes)

0EE00H-0FFFFH (4608 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

Internal Data Area Internal ROM Area

µPD784035Y

FF700H-FFFFFH

00000H-0BFFFH

µPD784036Y

00000H-0FFFFH

µPD784037Y

FF100H-FFFFFH

00000H-17FFFH

µPD784038Y

FEE00H-FFFFFH 00000H-1FFFFH

• External memory

The external memory is accessed in external memory expansion mode.

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