at83c5132 ATMEL Corporation, at83c5132 Datasheet - Page 32

• Manufacturer Part Number: at83c5132
• Description: Usb Microcontroller With 64k Bytes Flash Memory
• Manufacturer: ATMEL Corporation

Waveforms
External Clock Drive and Logic Level References
Definition of Symbols
Timings
Waveforms
36
AT89C5132
Figure 14. Flash Memory – ISP Waveforms
Note:
Figure 15. Flash Memory – Internal Busy Waveforms
Table 16. External Clock Timing Symbol Definitions
Table 17. External Clock AC Timings
V
Figure 16. External Clock Waveform
Symbol
0.45 V
DD
= 2.7 to 3.3V, T
V
T
T
T
T
T
DD
T
CHCX
CLCX
CLCH
CHCL
CLCL
1. ISP must be driven through a pull-down resistor (see Section “In-system Program-
C
CR
FBUSY bit
ISP
- 0.5
RST
ming”, page 22).
(1)
V
IL
Signals
V
IH1
Parameter
Clock Period
High Time
Low Time
Rise Time
Fall Time
Cyclic Ratio in X2 Mode
Clock
A
= -40 to +85°C
T
CHCL
T
SVRL
T
CLCX
T
T
BHBL
T
CLCH
RLSX
T
CLCL
Min
H
L
X
50
10
10
40
3
3
Conditions
T
CHCX
Max
High
Low
No Longer Valid
60
4173CS–USB–07/04
Unit
ns
ns
ns
ns
ns
%