Rainbow Electronics T89C51AC2 - Manual (Page 106)

106
T89C51AC2
Rev. B – 19-Dec-01
18.5.14 Flash Memory Table 69. Timing Symbol Definitions
Table 70. Memory AC Timing
VDD= 5 V +/- 10% , TA= -40 to +85
°
C
Figure 45. FLASH Memory - ISP Waveforms
Figure 46. FLASH Memory - Internal Busy Waveforms
Signals Conditions
S(Hardware
condition)
PSEN#,EA L Low
R RST V Valid
B FBUSY flag X No Longer Valid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
PSEN#1
T
RLSX
FBUSY bit
T
BHBL