UPD754264 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD754264

4-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD754264

5. MEMORY CONFIGURATION

• Program memory (ROM) • • • 4096 × 8 bits

• Addresses 0000H and 0001H

Vector table wherein the program start address and the values set for the RBE and MBE at the time a RESET

signal is generated are written. Reset and start are possible at an arbitrary address.

• Addresses 0002H to 000FH

Vector table wherein the program start address and values set for the RBE and MBE by the vectored interrupts

are written. Interrupt service can be started at an arbitrary address.

• Addresses 0020H to 007FH

Table area referenced by the GETI instructionNote.

Note The GETI instruction realizes a 1-byte instruction on behalf of an arbitrary 2-byte instruction, 3-byte

instruction, or two 1-byte instructions. It is used to decrease the program steps.

• Data memory

• Data area

Static RAM

EEPROM

• Peripheral hardware area

• • • 128 words × 4 bits (000H to 07FH)

• • • 32 words × 8 bits (400H to 43FH)

• • • 128 words × 4 bits (F80H to FFFH)

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