Instruction Manual

Preliminary W79E8213/W79E8213R Data Sheet
Publication Release Date: July 11, 2008
- 51 - Revision A2
OPERAND
OPERANDOPERAND
OP-CODE
Address A15-8Address A15-8Address A15-8
Address A15-8
A7-0
A7-0
A7-0
A7-0
Operand FetchOperand FetchOperand FetchInstruction Fetch
C2C1 C4C3C2
C1
CPU CLK
ALE
PSEN
AD<7:0>
A
ddress<15:0>
C4C3 C2C1 C4C3 C2C1 C4C3
Figure 9-4: Four Cycles Instruction Timing
OPERANDOPERAND
OPERAND
OP-CODE
Address A15-8Address A15-8Address A15-8Address A15-8
A7-0A7-0A7-0A7-0
Operand Fetch
Operand Fetch
Operand FetchOperand FetchInstruction Fetch
C2C1 C4C3C2C1
CPU CLK
ALE
PSEN
AD<7:0>
A
ddress<15:0>
C4C3 C2C1 C4C3 C2C1 C4C3 C2C1 C4C3
OPERAND
A7-0
Address A15-8
Figure 9-5: Five Cycles Instruction Timing