AT89LP51ED2 Atmel Corporation, AT89LP51ED2 Datasheet - Page 162

• 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

Figure 20-4. Dual Comparator Configuration Examples
162
AT89LP51RD2/ED2/ID2 Preliminary
a. dual independent comparators with external references
b. 3-channel comparator with external reference
c. 4-channel comparator with internal reference
d. 2-channel comparator with internal reference &
e. 2-channel comparator with external reference &
AIN0
AIN1
AIN0
AIN2
AIN3
AIN0
AIN1
AIN2
AIN3
comparator with external reference
AIN0
AIN1
comparator with internal reference
AIN0
AIN2
CSA = 00 RFA = 00
AIN1
CSA = 00/01 RFA = 10
CSA = 00/10 RFA = 00
V
+
-
AREF
A
CSA = 00/01/10/11 RFA = 10
AIN1
V
CSA = 00/10/11 RFA = 00
AREF
+
+
-
-
A
A
CMPA
CMPA
CMPA
+
+
-
-
A
A
AIN3
AIN2
CSB = 11 RFB = 00
AIN3
AIN2
AIN3
V
CSB = 11 RFB = 00
AREF
CSB = 11 RFB = 10
CMPA
CMPA
+
-
B
+
+
-
-
B
B
CMPB
CMPB
CMPB
AIN2
AIN0
AIN3
AIN1
AIN0
AIN1
AIN2
AIN3
f. 2-channel window
g. 4-channel window
comparator with
external reference
CSA = CSB = 00/01/10/11
comparator with
internal reference
V
V
RFA = 01 RFB = 11
CSA = CSB = 00/11
AREF+Δ
AREF-Δ
RFA = RFB = 00
+
+
+
+
-
-
-
-
B
A
B
A
CMPB
CMPA
CMPB
CMPA
3714A–MICRO–7/11