AT89LP428-20MU ATMEL [ATMEL Corporation], AT89LP428-20MU Datasheet - Page 101

• Manufacturer Part Number: AT89LP428-20MU
• Description: 8-bit Microcontroller with 4K/8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 18-3. Dual Comparator Configuration Examples
3654A–MICRO–8/09
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
AT89LP428/828
+
+
+
+
-
-
-
-
B
A
B
A
CMPB
CMPA
CMPB
CMPA
101