AT89C51ID2-SLSIM Atmel, AT89C51ID2-SLSIM Datasheet - Page 145

• Manufacturer Part Number: AT89C51ID2-SLSIM
• Description: C51ID2 64KF TWI 32KHZ PLCC44 3-5.5V IND.
• Manufacturer: Atmel

External Program Memory
Read Cycle
External Data Memory
Characteristics
145
AT89C51ID2
PORT 0
PORT 2
PSEN
ALE
INSTR IN
OR SFR-P2
ADDRESS
Table 101. Symbol Description
T
LHLL
T
T
LLAX
Symbol
AVLL
T
T
T
T
T
T
T
T
T
T
T
T
T
T
A0-A7
WLWH
QVWX
QVWH
WHQX
RHDX
AVWL
WHLH
RLRH
RLDV
RHDZ
AVDV
LLDV
LLWL
RLAZ
T
AVIV
ADDRESS A8-A15
T
LLIV
T
LLPL
TPLAZ
T
Parameter
RD Pulse Width
WR Pulse Width
RD to Valid Data In
Data Hold After RD
Data Float After RD
ALE to Valid Data In
Address to Valid Data In
ALE to WR or RD
Address to WR or RD
Data Valid to WR Transition
Data Set-up to WR High
Data Hold After WR
RD Low to Address Float
RD or WR High to ALE high
PLIV
T
PLPH
INSTR IN
T
PXIX
12 T
CLCL
T
PXIZ
T
PXAV
A0-A7
ADDRESS A8-A15
INSTR IN
4289C–8051–11/05