AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 162

• Manufacturer Part Number: AT89LP51ED2-20MU
• Description: 8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
• Manufacturer: Atmel

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

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