PIC16F874-20/L Microchip Technology, PIC16F874-20/L Datasheet - Page 375

• Manufacturer Part Number: PIC16F874-20/L
• Description: IC MCU FLASH 4KX14 EE 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F874-20/L

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 192 B
• Interface Type: MSSP, PSP, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 70 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, DM163022, DV164120
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164309 - MODULE SKT FOR PM3 44PLCC444-1001 - DEMO BOARD FOR PICMICRO MCUDVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Lead Free Status / Rohs Status: Details

Figure 20-1:
CM2:CM0 = 000
Comparators Reset (POR Default Value)
CM2:CM0 = 100
Two Independent Comparators
CM2:CM0 = 011
Two Common Reference Comparators
CM2:CM0 = 101
One Independent Comparator
1997 Microchip Technology Inc.
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
A = Analog Input, port reads as zeros always.
D = Digital Input.
CIS (CMCON<3>) is the Comparator Input Switch.
A
A
A
A
A
A
A
A
A
D
A
A
D
D
A
A
Comparator I/O Operating Modes
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
C1
C2
C1
C2
C1
C2
C1
C2
Off
Off
C1OUT
C2OUT
C1OUT
C2OUT
Off
C2OUT
(Read as '0')
(Read as '0')
(Read as '0')
Section 20. Comparator
CM2:CM0 = 110
Two Common Reference Comparators with Outputs
CM2:CM0 = 111
Comparators Off
CM2:CM0 = 010
Four Inputs Multiplexed to Two Comparators
CM2:CM0 = 001
Three Inputs Multiplexed to Two Comparators
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA4
A
D
A
A
D
D
D
D
A
A
A
A
A
A
A
A
Open Drain
V
V
V
V
V
V
V
V
CIS = 0
CIS = 1
CIS = 0
CIS = 1
CIS = 0
CIS = 1
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
C1
C2
C1
C2
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
C1OUT
C2OUT
Off
Off
C1
C2
C1
C2
DS31020A-page 20-5
From V
(Read as '0')
(Read as '0')
REF
C1OUT
C2OUT
C1OUT
C2OUT
Module
20