7906 datasheet(21/531 Pages) RENESAS

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7906 Group User’s Manual Rev.2.0

1-6

1.4 Block diagram

Figure 1.4.1 shows the M37906 block diagram.

Fig. 1.4.1 M37906 block diagram

Arithmetic Logic

Unit (16)

Accumulator A (16)

Accumulator B (16)

Index Register X (16)

Index Register Y (16)

Stack Pointer S (16)

Direct Page Register DPR3 (16)

Direct Page Register DPR2 (16)

Direct Page Register DPR1 (16)

Direct Page Register DPR0 (16)

Processor Status Register PS (11)

Input Buffer Register IB (16)

Data bank Register DT (8)

Program Bank Register PG (8)

Program Counter PC (16)

Incrementer/Decrementer (24)

Data Address Register DA (24)

Program Address Register PA (24)

Incrementer (24)

Instruction Queue Buffer Q8 (8)

Instruction Queue Buffer Q9 (8)

Instruction Queue Buffer Q7 (8)

Instruction Queue Buffer Q6 (8)

Instruction Queue Buffer Q5 (8)

Instruction Queue Buffer Q4 (8)

Instruction Queue Buffer Q3 (8)

Instruction Queue Buffer Q2 (8)

Instruction Queue Buffer Q1 (8)

Instruction Queue Buffer Q0 (8)

Data Buffer DQ3 (8)

Data Buffer DQ2 (8)

Data Buffer DQ1 (8)

Data Buffer DQ0 (8)

Data Bus (Even)

Data Bus (Odd)

Address Bus

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