DS89C430-DS89C450 Dallas Semiconducotr, DS89C430-DS89C450 Datasheet - Page 28

• Manufacturer Part Number: DS89C430-DS89C450
• Description: Ultra-High-Speed Flash Microcontrollers
• Manufacturer: Dallas Semiconducotr

Figure 8. Nonpage Mode, External Data Memory Access (Stretch = 0, CD1:CD2 = 10)
Figure 9. Nonpage Mode, External Data Memory Access (Stretch = 1, CD1:CD2 = 10)
XTAL1
RD/WR
XTAL1
RD/WR
Port 0
Port 2
Port 0
Port 2
ALE
PSEN
PSEN
ALE
MOVX
Instruction
Fetch
MOVX
Instruction
Fetch
A
A
A
A
MOVX
MOVX
1st Machine Cycle
1st Machine Cycle
A
A
MOVX Instruction
INST
INST
MOVX Instruction
2nd Machine Cycle
2nd Machine Cycle
28 of 47
Memory
Access
Stretch = 0
A
A
A
A
Memory Access
Stretch = 1
DATA
DATA
3rd Machine Cycle