DS89C420 Dallas Semiconducotr, DS89C420 Datasheet - Page 51

• Manufacturer Part Number: DS89C420
• Description: Ultra-High-Speed Microcontroller
• Manufacturer: Dallas Semiconducotr

Figure 13. Page-Mode 1 Timing
Figure 14. Page-Mode 2 Timing
XTAL1
PSEN
Port 0
Port 2
XTAL1
ALE
RD
WR
PSEN
Port 0
Port 2
ALE
RD
WR
LSB
OPCODE
t
MSB
AVIV2
t
t
t
LSB
AVLL
AVLL2
LLIV
t
CLCL
t
LSB
t
CLCL
t
PXIX
LLAX
MOVX
OPCODE
t
LLPL
t
PLIV
t
AVLL2
LSB
MOVX
t
AVIV0
LSB
MOVX
t
PXIZ
MSB
t
PLPH
LSB
MOVX
t
LHLL
t
t
LLAX3
t
t
RHDX
LSB
LLWL
RLRH
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t
t
DATA
RLDV
AVDV2
t
t
AVDV0
AVDV2
MSB
t
LLDV
t
t
LHLL
MSB
LSB
AVLL3
t
t
RLRH
AVWL2
t
DATA
LLAX3
t
RLDV
t
t
t
LSB
PLPH
LLAX
PXIX
t
OPCODE
t
t
RHDX
PLAZ
RHDZ
t
MSB
PLIV
t
AVIV2
MSB
LSB
t
AVWL0
OPCODE
LSB
t
t
t
LLAX2
QVWX
AVWL2
DATA
t
WLWH
MSB
MSB
t
t
t
WHLH
t
WLWH
LSB
WHQX
WHLH
t
LLWL
t
t
WHQX
LLAX2
t
QVWX
DATA