UPD75P4308GS datasheet(15/60 Pages) NEC

15 / 60 page

µPD75P4308

6. MEMORY CONFIGURATION

Figure 6-1. Program Memory Map

MBE

RBE

Internal reset start address (upper 5 bits)

Internal reset start address (lower 8 bits)

INTBT/INT4 start address (upper 5 bits)

INTBT/INT4 start address (lower 8 bits)

INT0 start address (upper 5 bits)

INT0 start address (lower 8 bits)

INT1 start address (upper 5 bits)

INT1 start address (lower 8 bits)

INTCSI start address (upper 5 bits)

INTCSI start address (lower 8 bits)

INTT0 start address (upper 5 bits)

INTT0 start address (lower 8 bits)

INTT1 start address (upper 5 bits)

INTT1 start address (lower 8 bits)

Reference table for GETI instruction

0000H

0002H

0004H

0006H

0008H

000AH

000CH

007FH

0080H

07FFH

0800H

0FFFH

1000H

1FFFH

CALLF

!faddr instruction

entry address

Branch address for

the following instructions

Branch/call

address

by GETI

BR $addr instruction

relative branch address

(–15 to –1,

+2 to +16)

BRCB

!caddr instruction

branch address

BRCB

!caddr instruction

branch address

• BR BCDE

• BR BCXA

• BR !addr

• CALL !addr

• BRA !addr1

• CALLA !addr1

Note

0020H

Note Can be used only in the Mk II mode.

Remark For instructions other than those noted above, the “BR PCDE” and “BR PCXA” instructions can be used

to branch to addresses with changes in the PC’s lower 8 bits only.

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