Rainbow Electronics DS89C450 - Manual (Page 8)

DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
8 of 48
Figure 2. Page Mode 1 Timing
ALE
Port 0
Port 2 LSB
DATA
XTAL1
PSEN
RD
WR
LSB LSB LSB
DATA MOVX OPCODE
t
CLCL
t
AVLL2
t
LHLL
t
RLDV
t
WLWH
t
LLAX2
t
LLWL
t
LLAX
t
AVIV2
t
PXIX
t
PLPH
t
PLIV
t
AVWL2
t
LLAX3
t
RLRH
t
WHLH
t
WHQX
MSB LSB MSB MSB MSB LSB
OPCODE MOVX
t
QVWX
t
AVDV2
t
RHDX
Figure 3. Page Mode 2 Timing
ALE
Port 0
Port 2
MSB OPCODE
XTAL1
PSEN
RD
WR
MSB MSB
LSB
MSB DATA MOVX MOVX
t
CLCL
t
AVLL2
t
LHLL
t
WLWH
t
LLAX2
t
LLWL
t
LLPL
t
LLIV
t
AVIV0
t
PXIX
t
PLIV
t
AVLL3
t
LLAX3
t
PLPH
t
PLAZ
t
WHLH
t
WHQX
t
QVWX t
AVIV2
t
AVDV2
t
AVWL2
t
PXIZ
t
AVLL
t
LLDV
t
AVDV0
t
RHDX
t
RHDZ
t
RLDV
t
AVWL0
t
LLAX
LSB LSB LSB LSB LSB
OPCODE DATA
t
RLRH