at89lv52 ATMEL Corporation, at89lv52 Datasheet - Page 20

• Manufacturer Part Number: at89lv52
• Description: 8-bit Microcontroller With 8k Bytes Flash With 8k Bytes Flash
• Manufacturer: ATMEL Corporation

Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
Shift Register Mode Timing Waveforms
AC Testing Input/Output Waveforms
Note:
4-102
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
1.
AC Inputs during testing are driven at V
a logic 1 and 0.45V for a logic 0. Timing measure-
ments are made at V
max. for a logic 0.
Parameter
Serial Port Clock Cycle Time
Output Data Setup to Clock Rising Edge
Output Data Hold After Clock Rising Edge
Input Data Hold After Clock Rising Edge
Clock Rising Edge to Input Data Valid
IH
min. for a logic 1 and V
CC
Not
= 2.7V to 6.0V and Load Capacitance = 80 pF.
CC
- 0.5V for
IL
(1)
Min
700
1.0
50
0
12 MHz Osc
Float Waveforms
Note:
1.
Max
700
For timing purposes, a port pin is no longer floating
when a 100 mV change from load voltage occurs. A
port pin begins to float when a 100 mV change from
the loaded V
10t
2t
12t
OH
CLCL
CLCL
Min
Variable Oscillator
/V
(1)
CLCL
0
OL
-117
-133
level occurs.
10t
CLCL
Max
-133
Units
ns
ns
ns
ns
s