UPD750068A データシートの表示（PDF） - NEC => Renesas Technology

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UPD750068A

4 BIT SINGLE CHIP CMOS MICROCOMPUTERS

NEC => Renesas Technology 

µPD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)

5. MEMORY CONFIGURATION

Program memory (ROM) .... 4096 × 8 bits (µPD750064)

.... 6144 × 8 bits (µPD750066)

.... 8192 × 8 bits (µPD750068)

• 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 start is possible from any address.

• Addresses 0002H to 000DH

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

interrupt are written. Interrupt processing can start from any address.

• Addresses 0020H to 007FH

Table area referenced by the GETI instructionNote.

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

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

Data memory (RAM)

• Data area

.... 512 words × 4 bits (000H to 1FFH)

• Peripheral hardware area .... 128 words × 4 bits (F80H to FFFH)

18

Data Sheet U10165EJ2V0DS00

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