AT89LP51ED2 Atmel Corporation, AT89LP51ED2 Datasheet - Page 120
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AT89LP51ED2
Manufacturer Part Number
AT89LP51ED2
Description
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
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Figure 17-2. Mode 0 Waveforms (Two-Wire)
Figure 17-3. UART Mode 0 TWI Emulation (SMOD1 = 1)
120
Write to SBUF
(SDA) RXD
(SCL) TXD
AT89LP51RD2/ED2/ID2 Preliminary
SMOD1 = 0
SM2 = 0
SMOD1 = 1
SM2 = 0
SMOD1 = 0
SM2 = 1
SMOD1 = 1
SM2 = 1
SM2
P3.0
TI
RXD (RX)
RXD (RX)
RXD (RX)
RXD (RX)
RXD (TX)
RXD (TX)
RXD (TX)
RXD (TX)
TXD
TXD
TXD
TXD
0
1
0
0
0
0
0
0
0
0
2
1
1
1
1
1
1
1
1
3
2
2
2
2
2
2
2
2
4
3
3
3
3
3
3
3
3
5
4
4
4
4
4
4
4
4
6
5
5
5
5
5
5
Sample ACK
5
5
7
6
6
6
6
6
6
6
6
ACK
7
7
7
7
7
7
7
7
3714A–MICRO–7/11
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