AT89LP51 Atmel Corporation, AT89LP51 Datasheet - Page 104
AT89LP51
Manufacturer Part Number
AT89LP51
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT89LP51.pdf
(117 pages)
Specifications of AT89LP51
Flash (kbytes)
4 Kbytes
Max. Operating Frequency
20 MHz
Cpu
8051-1C
Max I/o Pins
36
Uart
1
Sram (kbytes)
0.25
Eeprom (bytes)
256
Self Program Memory
IAP
Operating Voltage (vcc)
2.4 to 5.5
Timers
3
Isp
SPI
Watchdog
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89LP51-20JU
Manufacturer:
Atmel
Quantity:
44
Company:
Part Number:
AT89LP51-20PU
Manufacturer:
TI
Quantity:
183
Company:
Part Number:
AT89LP51RD2-20AAU
Manufacturer:
INFINEON
Quantity:
450
18.7
The values in this table are valid for V
Figure 18-17. Shift Register Mode Timing Waveform
18.8
18.8.1
Note:
104
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
Serial Port Timing: Shift Register Mode
Test Conditions
1. AC Inputs during testing are driven at V
AT89LP51/52
AC Testing Input/Output Waveform
Write to SBUF
Write to SBUF
V
Output Data
Output Data
Input Data
Input Data
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
Input Data Valid to Clock Rising Edge
IH
Clear RI
Clear RI
min. for a logic “1” and V
Clock
Clock
0
Valid
Valid
0
IL
DD
max. for a logic “0”.
= 2.4V to 5.5V and Load Capacitance = 80 pF.
1
Valid
Valid
1
DD
(1)
- 0.5V for a logic “1” and 0.45V for a logic “0”. Timing measurements are made at
2
Valid
Valid
2
3t
4t
t
CLCL
CLCL
CLCL
Min
15
0
-15
3
Valid
Valid
-15
-15
SMOD1 = 0
SMOD1 = 0
SMOD1 = 1
3
4
Valid
Valid
Max
4
5
Valid
Valid
2t
5
t
t
CLCL
CLCL
CLCL
Min
15
0
-15
-15
-15
SMOD1 = 1
6
Valid
Valid
6
Max
7
Valid
Valid
3709D–MICRO–12/11
7
Units
µs
ns
ns
ns
ns