PIC16F628-20I/SS Microchip Technology, PIC16F628-20I/SS Datasheet - Page 56

• Manufacturer Part Number: PIC16F628-20I/SS
• Description: IC MCU FLASH 2KX14 COMP 20SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F628-20I/SS

• Core Size: 8-Bit
• Program Memory Size: 3.5KB (2K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 224 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SSOP
• Controller Family/series: PIC16F
• No. Of I/o's: 16
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 224Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 224 B
• Interface Type: SCI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT20SS-1 - SOCKET TRANSITION 18DIP 20SSOPAC164307 - MODULE SKT FOR PM3 28SSOPAC164018 - MODULE SKT PROMATEII 20SSOP
• Data Converters: -
• Lead Free Status / Rohs Status: Details

PIC16F62X
9.1
There are eight modes of operation for the
comparators. The CMCON register is used to select
the mode. Figure 9-1 shows the eight possible modes.
The TRISA register controls the data direction of the
comparator pins for each mode. If the Comparator
FIGURE 9-1:
DS40300C-page 54
Comparators Reset (POR Default Value)
CM2:CM0 = 000
Two Independent Comparators
CM2:CM0 = 100
Two Common Reference Comparators
CM2:CM0 = 011
One Independent Comparator
CM2:CM0 = 101
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
A = Analog Input, port reads zeros always.
D = Digital Input.
CIS (CMCON<3>) is the Comparator Input Switch.
Comparator Configuration
D
D
A
A
A
A
A
A
A
D
A
A
A
A
A
A
V
COMPARATOR I/O OPERATING MODES
SS
V
V
V
V
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
V
V
V
V
IN
IN
IN
IN
-
+
-
+
-
+
-
+
IN
IN
IN
IN
-
+
-
+
-
+
-
+
C1
C2
C1
C2
C1
C2
C1
C2
C2V
Off (Read as '0')
Off (Read as '0')
Off (Read as '0')
C1V
C2V
C1V
C2V
OUT
OUT
OUT
OUT
OUT
Preliminary
Comparators Off
CM2:CM0 = 111
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
Four Inputs Multiplexed to Two Comparators
CM2:CM0 = 010
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
Three Inputs Multiplexed to Two Comparators
CM2:CM0 = 001
This mode is disfunctional and has been corrected in the ‘A’
Revision Devices.
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3/CMP1
RA1/AN1
RA2/AN2/CMP2
RA4/T0CKI/C20
Two Common Reference Comparators with Outputs
CM2:CM0 = 110
mode is changed, the comparator output level may not
be valid for the specified mode change delay shown
in Table 17-1.
Note:
Comparator interrupts should be disabled
during a Comparator mode change other-
wise a false interrupt may occur.
A
A
A
A
A
A
A
A
D
D
D
D
Open Drain
A
D
A
A
V
SS
CIS = 0
CIS = 1
CIS = 0
CIS = 1
CIS = 0
CIS = 1
V
V
V
V
IN
IN
IN
IN
V
V
V
V
-
+
-
+
IN
IN
IN
IN
 2003 Microchip Technology Inc.
-
+
-
+
C1
C2
V
V
V
V
V
V
V
V
C1
C2
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
+
+
C1
C2
C1
C2
Off (Read as '0')
Off (Read as '0')
From V
Module
C1V
C2V
OUT
OUT
REF
C1V
C2V
C1V
C2V
OUT
OUT
OUT
OUT