AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 235
AT89LP51ED2-20MU
Manufacturer Part Number
AT89LP51ED2-20MU
Description
8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
Manufacturer
Atmel
Datasheet
1.AT89LP51ED2-20AAU.pdf
(254 pages)
Specifications of AT89LP51ED2-20MU
Rohs
yes
Core
8051
Data Bus Width
8 bit
Maximum Clock Frequency
20 MHz
Program Memory Size
64 KB
Data Ram Size
256 B
On-chip Adc
Yes
Operating Supply Voltage
2.4 V to 5.5 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
VQFN-44
Mounting Style
SMD/SMT
Data Rom Size
4 KB
Interface Type
2-Wire, SPI, UART
Number Of Programmable I/os
36
Number Of Timers
3
Processor Series
AT89x
Program Memory Type
Flash
Factory Pack Quantity
360
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Figure 25-14. Two-wire Serial Bus Timing
25.9
The values in this table are valid for V
Figure 25-15. Shift Register Mode Timing Waveform
3714A–MICRO–7/11
SCL
SDA
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
3. C
4. f
Serial Port Timing: Shift Register Mode
t
SU;STA
Write to SBUF
Write to SBUF
Output Data
Output Data
CK
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
b
Clear RI
Clear RI
= capacitance of one bus line in pF.
= CPU clock frequency
Clock
Clock
t
HD;STA
0
Valid
Valid
t
t
of
LOW
0
DD
= 2.4V to 5.5V and Load Capacitance = 80 pF.
1
Valid
Valid
1
t
HIGH
t
HD;DAT
2
Valid
Valid
AT89LP51RD2/ED2/ID2 Preliminary
2
4t
3t
t
CLCL
CLCL
CLCL
Min
15
0
t
LOW
-15
3
-15
Valid
Valid
-15
SMOD1 = 0
SMOD1 = 0
SMOD1 = 1
3
t
SU;DAT
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
t
SU;STO
Max
7
t
r
Valid
Valid
7
Units
µs
ns
ns
ns
ns
t
BUF
235
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