DS89C440 Maxim, DS89C440 Datasheet - Page 8

• Manufacturer Part Number: DS89C440
• Description: The DS89C430 and DS89C450 offer the highest performance available in 8051-compatible microcontrollers
• Manufacturer: Maxim

Figure 2. Page Mode 1 Timing
Figure 3. Page Mode 2 Timing
XTAL1
XTAL1
PSEN
Port 0
Port 2
PSEN
Port 0
Port 2
ALE
RD
WR
ALE
RD
WR
LSB
OPCODE
MSB
t
AVIV2
t
t
t
AVLL
AVLL2
LLIV
t
LSB
LSB
t
t
CLCL
PXIX
t
CLCL
LLAX
OPCODE
MOVX
t
LLPL
t
PLIV
t
AVLL2
LSB
t
AVIV0
LSB
MOVX
MOVX
t
PXIZ
t
MSB
PLPH
LSB
MOVX
t
LHLL
t
t
t
t
LLAX3
RHDX
LSB
LLWL
RLRH
DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
t
t
t
DATA
t
RLDV
AVDV2
AVDV0
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AVDV2
MSB
t
LLDV
t
t
LHLL
LSB
AVLL3
t
t
RLRH
AVWL2
MSB
t
DATA
LLAX3
t
RLDV
t
t
t
LSB
PLPH
LLAX
PXIX
t
t
t
RHDX
PLAZ
RHDZ
MSB
OPCODE
t
AVIV2
t
PLIV
LSB
MSB
t
AVWL0
OPCODE
t
LSB
WLWH
t
t
t
LLAX2
QVWX
AVWL2
DATA
MSB
t
t
WHLH
LSB
WHQX
t
LLWL
MSB
t
t
t
WLWH
LLAX2
WHLH
t
QVWX
DATA
t
WHQX