TS80C51RA2 Atmel Corporation, TS80C51RA2 Datasheet - Page 64

• Manufacturer Part Number: TS80C51RA2
• Description: High Performance 8-bit Microcontroller
• Manufacturer: Atmel Corporation

External Program Memory
Read Cycle
Figure 25. External Program Memory Read Cycle
External Data Memory
Characteristics
64
TS8xC51Rx2
PORT 0
PORT 2
PSEN
ALE
INSTR IN
OR SFR-P2
ADDRESS
T
Symbol
LHLL
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
WLWH
QVWX
QVWH
WHQX
WHLH
RLRH
RHDX
RHDZ
AVDV
AVWL
RLDV
LLDV
LLWL
RLAZ
T
LLAX
AVLL
A0-A7
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
T
AVIV
ADDRESS A8-A15
T
LLIV
T
LLPL
TPLAZ
T
PLIV
T
PLPH
INSTR IN
T
PXIX
12 T
CLCL
T
PXIZ
T
PXAV
A0-A7
ADDRESS A8-A15
INSTR IN
4188A–8051–10/02