PIC16F874A-I/PT Microchip Technology, PIC16F874A-I/PT Datasheet - Page 138
![IC MCU FLASH 4K 20MHZ 44-TQFP](/photos/6/82/68251/c04-076_pt_sml.jpg)
PIC16F874A-I/PT
Manufacturer Part Number
PIC16F874A-I/PT
Description
IC MCU FLASH 4K 20MHZ 44-TQFP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16C770-ISO.pdf
(8 pages)
4.PIC16F873A-ISO.pdf
(234 pages)
5.PIC16F873A-ISO.pdf
(6 pages)
6.PIC16F873A-ISO.pdf
(4 pages)
7.PIC16F873A-ISO.pdf
(6 pages)
8.PIC16F873A-ISO.pdf
(4 pages)
9.PIC16F873A-ISO.pdf
(22 pages)
Specifications of PIC16F874A-I/PT
Program Memory Type
FLASH
Program Memory Size
7KB (4K x 14)
Package / Case
44-TQFP, 44-VQFP
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
33
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
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
192 B
Interface Type
I2C/SPI/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
+ 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, DM163022, DV164120
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F874A-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC16F874A-I/PT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
PIC16F87XA
12.1
There are eight modes of operation for the compara-
tors. The CMCON register is used to select these
modes. Figure 12-1 shows the eight possible modes.
The TRISA register controls the data direction of the
comparator pins for each mode. If the Comparator
FIGURE 12-1:
DS39582B-page 136
Comparators Reset
CM2:CM0 = 000
Two Independent Comparators
CM2:CM0 = 010
Two Common Reference Comparators
CM2:CM0 = 100
One Independent Comparator with Output
CM2:CM0 = 001
A = Analog Input, port reads zeros always. D = Digital Input. CIS (CMCON<3>) is the Comparator Input Switch.
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
RA4/T0CKI/C1OUT
RA1/AN1
RA2/AN2
Comparator Configuration
A
A
A
A
A
A
A
A
A
A
A
D
A
A
D
D
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
COMPARATOR I/O OPERATING MODES
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
C1
C2
C1
C2
C1
C2
C1
C2
Off (Read as ‘0’)
Off (Read as ‘0’)
C1OUT
C2OUT
C1OUT
C2OUT
C1OUT
Off (Read as ‘0’)
Two Common Reference Comparators with Outputs
CM2:CM0 = 101
Two Independent Comparators with Outputs
CM2:CM0 = 011
RA4/T0CKI/C1OUT
Comparators Off (POR Default Value)
CM2:CM0 = 111
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA5/AN4/SS/C2OUT
Four Inputs Multiplexed to Two Comparators
CM2:CM0 = 110
RA0/AN0
RA3/AN3
RA4/T0CKI/C1OUT
RA1/AN1
RA2/AN2
RA5/AN4/SS/C2OUT
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
RA0/AN0
RA3/AN3
RA1/AN1
RA2/AN2
mode is changed, the comparator output level may not
be valid for the specified mode change delay shown in
Section 17.0 “Electrical Characteristics”.
Note:
A
A
A
D
A
A
A
A
D
D
D
D
A
A
A
A
Comparator interrupts should be disabled
during a Comparator mode change.
Otherwise, a false interrupt may occur.
V
V
V
V
V
V
V
V
V
V
V
V
CIS = 0
CIS = 1
CIS = 0
CIS = 1
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
-
+
-
+
-
+
-
+
-
+
-
+
C1
C2
2003 Microchip Technology Inc.
C1
C2
C1
C2
V
V
V
V
IN
IN
IN
IN
CV
-
+
-
+
REF
C1OUT
C2OUT
C1OUT
C2OUT
Off (Read as ‘0’)
Off (Read as ‘0’)
C1
C2
From Comparator
V
REF
Module
C1OUT
C2OUT