NEC PD750008 - Manual (Page 74)

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µPD750008 USER'S MANUAL
4.4.2 Specification of a Data Memory Bank
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
Figure 4-7. Data Memory Map
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 Note
Area for
general
register
Data area
static RAM
(512 x 4)
Peripheral
hardware area
Not contained
Memory bank