UPD754304GSA-XXX View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD754304GSA-XXX

4-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD754302, 754304, 754302(A), 754304(A)

Figure 5-1. Program Memory Map (1/2)

Address 7 6 5

0 0 0 0 H MBE RBE 0

0 0 0 2 H MBE RBE 0

0 0 0 4 H MBE RBE 0

0 0 0 6 H MBE RBE 0

0 0 0 8 H MBE RBE 0

0 0 0 A H MBE RBE 0

0 0 0 C H MBE RBE 0

0020H

007FH

0080H

(a) µPD754302

4

0 Internal reset start address

Internal reset start address

0 INTBT/INT4

INTBT/INT4

start address

start address

0 INT0

start address

INT0

start address

0 INT1

start address

INT1

start address

0 INTCSI

start address

INTCSI

start address

0 INTT0

start address

INTT0

start address

0 INTT1

start address

0

(high-order 4 bits)

(low-order 8 bits)

(high-order 4 bits)

(low-order 8 bits)

(high-order 4 bits)

(low-order 8 bits)

(high-order 4 bits)

(low-order 8 bits)

(high-order 4 bits)

(low-order 8 bits)

(high-order 4 bits)

(low-order 8 bits)

(high-order 4 bits)

CALLF

! faddr

instruction

entry

address Branch address of

BR BCXA, BR BCDE,

BR !addr, BRA !addr1Note or

CALLA !addr1Note instruction

CALL !addr instruction

subroutine entry address

BR $addr instruction

relative branch address

_15 to _1,

+2 to +16

INTT1

start address (low-order 8 bits)

Branch destination

address and

subroutine entry

address when GETI

instruction is executed

GETI instruction reference table

07FFH

Note Can be used in the Mk II mode only.

Remark In addition to the above, a branch can be taken to the address indicated by changing only the low-order

eight bits of PC by executing the BR PCDE or BR PCXA instruction.

17

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