AT89LP51ED2 Atmel Corporation, AT89LP51ED2 Datasheet - Page 234

• Manufacturer Part Number: AT89LP51ED2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51ED2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 2.25
• Eeprom (bytes): 4096
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

25.8
Table 25-7
Two-wire Serial Interface meets or exceeds these requirements under the noted conditions. The values shown in this table
are valid for T
Timing symbols refer to
Table 25-7.
Notes:
234
Symbol
V
V
V
V
t
t
t
I
C
f
Rp
t
t
t
t
t
t
t
t
r
of
SP
i
SCL
HD;STA
LOW
HIGH
SU;STA
HD;DAT
SU;DAT
SU;STO
BUF
(1)
OL
IL
IH
hys
i
(1)
(1)
(1)
(1)
(1)
Two-wire Serial Interface Characteristics
1. In AT89LP51RD2/ED2/ID2, this parameter is characterized and not 100% tested.
2. Required only for f
AT89LP51RD2/ED2/ID2 Preliminary
Parameter
Input Low-voltage
Input High-voltage
Hysteresis of Schmitt Trigger Inputs
Output Low-voltage
Rise Time for both SDA and SCL
Output Fall Time from V
Spikes Suppressed by Input Filter
Input Current each I/O Pin
Capacitance for each I/O Pin
SCL Clock Frequency
Value of Pull-up resistor
Hold Time (repeated) START Condition
Low Period of the SCL Clock
High period of the SCL clock
Set-up time for a repeated START condition
Data hold time
Data setup time
Setup time for STOP condition
Bus free time between a STOP and START
condition
describes the requirements for devices connected to the Two-wire Serial Bus. The AT89LP51RD2/ED2/ID2
A
Two-wire Serial Bus Requirements
= -40°C to 85°C and V
Figure
SCL
25-14.
> 100 kHz.
IHmin
to V
DD
= 2.4 to 5.5V, unless otherwise noted.
ILmax
10 pF < C
0.1V
3 mA sink current
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
CK
DD
Condition
(4)
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
> 100 kHz
< V
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
> 16f
b
< 400 pF
i
< 0.9V
SCL
DD
(3)
20 + 0.1C
20 + 0.1C
V
---------------------------- -
V
---------------------------- -
0.05 V
DD
DD
0.7 V
3mA
3mA
Min
-0.5
250
100
-10
4.0
0.6
4.7
1.3
4.0
0.6
4.7
0.6
4.0
0.6
4.7
–
–
0
0
–
0
0
0
0.4V
0.4V
DD
DD
b
b
(2)
(3)(2)
(3)(2)
V
1000ns
------------------ -
0.3 V
DD
300ns
--------------- -
Max
50
3.45
300
250
400
0.4
0.9
C
10
10
C
–
–
–
–
–
–
–
–
–
–
–
–
–
–
+ 0.5
b
(2)
b
3714A–MICRO–7/11
DD
Units
kHz
µA
pF
ns
ns
ns
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
ns
ns
µs
µs
µs
V
V
V
V
Ω
Ω