at89c5131 ATMEL Corporation, at89c5131 Datasheet - Page 165

• Manufacturer Part Number: at89c5131
• Description: 8-bit Flash Microcontroller With Full Speed Usb Device At89c5131
• Manufacturer: ATMEL Corporation

Shift Register Timing Waveform
External Clock Drive
Characteristics (XTAL1)
External Clock Drive
Waveforms
AC Testing Input/Output
Waveforms
Float Waveforms
4136C–USB–04/05
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
INPUT DATA
CLEAR RI
T
QVXH
0
Table 121. AC Parameters
AC inputs during testing are driven at V
Timing measurement are made at V
For timing purposes as port pin is no longer floating when a 100 mV change from load
voltage occurs and begins to float when a 100 mV change from the loaded V
occurs. I
INPUT/OUTPUT
T
CHCX
Symbol
T
T
T
T
T
XHDV
T
CHCX
CLCH
CHCL
CLCL
CLCX
0.45V
/T
1
0
CLCX
V
OL
VALID
T
CC
XLXL
/I
-0.5V
OH
Parameter
Oscillator Period
High Time
Low Time
Rise Time
Fall Time
Cyclic ratio in X2 mode
T
≥ ±20 mA.
XHQX
2
1
VALID
0.2V
T
0.7V
V
V
3
XHDX
2
V
OH
OL
CC
VALID
CC
CC
-0.1
T
+ 0.1 V
- 0.1 V
0.45V
CHCL
-0.5V
4
3
VALID
FLOAT
V
IH
LOAD
min for a logic “1” and V
CC
5
4
VALID
- 0.5 for a logic “1” and 0.45V for a logic “0”.
T
CLCX
6
5
VALID
0.2 V
0.2 V
Min
25
40
5
5
CC
CC
T
V
V
7
CLCL
+ 0.9
- 0.1
LOAD
LOAD
6
VALID
+ 0.1 V
- 0.1 V
T
IL
CLCH
SET TI
SET RI
max for a logic “0”.
T
8
AT89C5131
7
CHCX
VALID
Max
60
5
5
OH
/V
Units
OL
ns
ns
ns
ns
ns
%
level
163