UPD75518 NEC, UPD75518 Datasheet - Page 33

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

Example
SP initialization
In this example, stack area is allocated in memory bank 2 and stack operation starts at address
2FFH.
SEL
MOV A, #2
MOV SBS, A
MOV XA, #00H
MOV SP, XA
Address
F80H
F84H
SBS
MB15
Fig. 3-7 Stack Pointer and Stack Bank Select Register Formats
SP7
; or CLR1 MBE
; Specify memory bank 2 as a stack area
; SP
SP6
00H
SP5
000H
0FFH
100H
1FFH
200H
2FFH
300H
3FFH
SP4
Memory bank 0
Memory bank 1
Memory bank 2
Memory bank 3
SP3
0
SP2
0
SBS1
SP1
SBS0
0
Symbol
SP
SBS
SP
SP
SP
SP
PD75518(A)
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