80C32E_14 Datasheet, PDF (13/20 Pages) ATMEL Corporation – 8032 Pin and Instruction Compatible

80C32E
Table 5. External Data Memory Characteristics (ns)
Symbol
T_RLRH
T_WLWH
T_RLDV
T_RHDX
T_RHDZ
T_LLDV
T_AVDV
T_LLWL
T_AVWL
T_QVWX
T_QVWH
T_WHQX
T_RLAZ
T_WHLH
Figure 8. External Data Memory Write Cycle
ALE
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_LLDV
T_WHLH
PSEN
RD
PORT 0
PORT 2
ADDRESS
OR SFR-P2
T_LLWL
T_RLDV
T_RLRH
T_LLAX
A0-A7
T_AVWL
T_AVDV
T_RLAZ
T_RHDX
DATA IN
ADDRESS A8-A15 OR SFR P2
T_RHDZ
30 MHz
min max
180
180
135
0
70
235
260
90 115
115
20
215
20
0
20 40
13
4149N–AERO–04/07