Manual

165
AT89C5131
4136A–USB–03/03
Flash Memory Table 114. Timing Symbol Definitions
Table 115. Memory AC Timing
VDD = 5V ± 10%, T
A
= -40 to +85°C
Figure 70. Flash Memory - ISP Waveforms
Figure 71. Flash Memory - Internal Busy Waveforms
Signals Conditions
S (Hardware
Condition)
PSEN
, EA L Low
RRST VValid
B FBUSY Flag X No Longer Valid
Symbol Parameter Min Typ Max Unit
T
SVRL
Input PSEN Valid to RST Edge 50 ns
T
RLSX
Input PSEN Hold after RST Edge 50 ns
T
BHBL
Flash Internal Busy (Programming) Time 10 ms
RST
T
SVRL
PSEN1
T
RLSX
FBUSY bit
T
BHBL