AT89C51SND1C-ROTIL ATMEL Corporation, AT89C51SND1C-ROTIL Datasheet - Page 42

• Manufacturer Part Number: AT89C51SND1C-ROTIL
• Description: Single-Chip Microcontroller with MP3 Decoder and Man-Machine Interface
• Manufacturer: ATMEL Corporation

Waveforms
External Clock Drive and Logic Level References
Definition of Symbols
Timings
Waveforms
42
AT8xC51SND1C
Figure 28. Flash Memory – ISP Waveforms
Note:
Figure 29. Flash Memory – Internal Busy Waveforms
Table 56. External Clock Timing Symbol Definitions
Table 57. External Clock AC Timings
V
Figure 30. External Clock Waveform
0.45 V
DD
= 2.7 to 3.3V, T
Symbol
V
T
T
T
T
T
T
DD
CHCX
CLCL
CLCX
CLCH
CHCL
ISP
page 28).
C
CR
ISP1
FBUSY Bit
- 0.5
RST
must be driven through a pull-down resistor (see Section “In-System Programming”,
V
IL
Signals
V
IH1
Parameter
Clock Period
High Time
Low Time
Rise Time
Fall Time
Cyclic Ratio in X2 mode
Clock
A
= 0 to 70°C
T
CHCL
T
SVRL
T
CLCX
T
T
BHBL
T
CLCH
RLSX
T
CLCL
H
X
Min
L
50
10
10
40
3
3
Conditions
T
CHCX
Max
High
Low
No Longer Valid
60
4106F–8051–10/02
Unit
ns
ns
ns
ns
ns
%