80C32E
Load capacitance for Port 0, ALE and PSEN = 100 pF; Load capacitance for all other
outputs = 80 pF.
Table 4. External Program Memory Characteristics (ns)
30 MHz
Symbol
TLHLL
TAVLL
TLLAX
TLLIV
Parameter
min
60
max
ALE Pulse Width
Address Valid to ALE
Address Hold After ALE
ALE to Valid Instr In
15
35
100
TLLPL
TPLPH
TPLIV
ALE to PSEN
25
80
PSEN Pulse Width
PSEN to Valid Instr In
Input Instr Hold After PSEN
Input Instr Float After PSEN
PSEN to Address Valid
Address to Valid Instr In
PSEN Low to Address Float
65
30
TPXIX
TPXIZ
TPXAV
TAVIV
0
35
130
6
TPLAZ
Figure 7. External Program Memory Read Cycle
12 TCLCL
TLHLL
TLLIV
TLLPL
ALE
PSEN
TPLPH
TPXAV
TPXIZ
TLLAX
TAVLL
TPLIV
TPLAZ
TPXIX
INSTR IN
PORT 0
PORT 2
INSTR IN
A0-A7
A0-A7
INSTR IN
TAVIV
ADDRESS A8-A15
ADDRESS
OR SFR-P2
ADDRESS A8-A15
13
Rev. K – 21-Aug-01
ATMEL [ ATMEL ]
