Specifications

179
3706C–MICRO–2/11
AT89LP3240/6440
3. Parameter t
LHLL
applies only when ALES =1.
4. The strobe pulse width may be lengthened by 1, 2 or 3 additional t
CLCL
using wait states.
5. Parameter t
WHLH
applies only when ALES = 0, or when two MOVX instructions occur in succession.
Figure 26-15. External Data Memory Read Cycle
Figure 26-16. External Data Memory Write Cycle
26.8 Serial Peripheral Interface Timing
The values shown in these tables are valid for T
A
= -40°C to 85°C and V
DD
= 2.4 to 3.6V, unless otherwise noted.
Table 26-5. SPI Master Characteristics
Symbol Parameter Min Max Units
t
CLCL
Oscillator Period 41.6 ns
t
SCK
Serial Clock Cycle Time 4t
CLCL
ns
t
SHSL
Clock High Time t
SCK
/2 - 25 ns
t
SLSH
Clock Low Time t
SCK
/2 - 25 ns
t
SR
Rise Time 25 ns
t
SF
Fall Time 25 ns
t
LHLL
ALE
DATA I N
A0 - A7
A8 - A15 FROM DPH OR P2.0 - P2.7P2
P2
RD
PORT 0
PORT 2
t
LLWL
t
RLRH
t
AVLL
t
LLAX
t
RLAZ
t
RHDZ
t
AVWL
t
WHLH
t
WHAX
t
AVDV
t
LLDV
t
RLDV
t
RHDX
t
LHLL
ALE
DATA OUTA0 - A7
A8 - A15 FROM DPH OR P2.0 - P2.7P2
P2
WR
PORT 0
PORT 2
t
LLWL
t
WLWH
t
AVLL
t
LLAX
t
QVWX
t
QVWH
t
WHQX
t
AVWL
t
WHLH
t
WHAX