DS89C430_07 Datasheet, PDF (34/46 Pages) Dallas Semiconductor – Ultra-High-Speed Flash Microcontrollers

DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
Figure 12. Page Mode 1, External Data Memory Access
(PAGES = 01, STRETCH = 1, CD = 10)
XTAL1
ALE
PSEN
RD/WR
Port 0
Inst
Inst
MOVX Instruction
MOVX
Inst
Data
Inst
Inst
Port 2 ^{LSB Addr LSB Addr MSB Addr LSB Addr LSB Addr}
LSB Addr
Memory Access (Stretch =1)
LSB Addr LSB Addr
ALE
PSEN
RD/WR
MOVX Instruction
Port 0
Inst
MOVX
Inst
Data
Inst
Inst
Inst
Port 2 ^{LSB Addr LSB Addr MSB Addr LSB Addr}
LSB Addr
MOVX Inst
Fetch
Memory Access (Stretch =1)
ALE
PSEN
RD/WR
MOVX Instruction
Port 0
Inst
MOVX
Inst
Data
Port 2
LSB Addr LSB Addr LSB Addr MSB Addr
LSB Addr
MOVX Inst
Fetch
Memory Access (Stretch =1)
LSB Addr LSB Addr LSB Addr
Inst
Inst
Inst
LSB Addr LSB Addr LSB Addr
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