NEC PD750004 Manuale Utente

µPD750008 USER'S MANUAL

If the memory bank enable flag (MBE) enables bank specification (MBE = 1), a memory bank is specified

with the 4-bit memory bank select register (MBS = 0, 1, 15).  If the MBE disables bank specification (MBE

= 0), memory bank 0 or 15 is automatically selected according to the addressing mode.  Locations in a bank

is addressed by 8-bit immediate data or a register pair.

For details on the selection of a memory bank and addressing, see Section 3.1.

For how to use the particular data memory areas, see the following sections and chapter.

• General register area

:  Section 4.5

• Stack memory area

:  Section 4.7

• Peripheral hardware area :  Chapter 5

Note Memory bank 0 or 1 can be selected as the stack area.

*

(32 x 4)

Data memory

000H

01FH

020H

0FFH

100H

1FFH

F80H

FFFH

256 x 4

(224 x 4)

256 x 4

128 x 4

0

1

15

Stack

area

Area for
general
register

Data area

static RAM 

(512 x 4)

Peripheral 
hardware area

Not contained

Memory bank