PIC16F872-I/SS Microchip Technology, PIC16F872-I/SS Datasheet - Page 424

• Manufacturer Part Number: PIC16F872-I/SS
• Description: IC MCU FLASH 2KX14 EE 28SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F872-I/SS

• Core Size: 8-Bit
• Program Memory Size: 3.5KB (2K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SSOP
• Controller Family/series: PIC16F
• No. Of I/o's: 22
• Eeprom Memory Size: 64Byte
• Ram Memory Size: 128Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: I2C, SPI, SSP
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3 bit
• 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
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164307 - MODULE SKT FOR PM3 28SSOPAC164020 - MODULE SKT PROMATEII 44TQFPXLT28SS-1 - SOCKET TRANSITION ICE 28SSOP
• Lead Free Status / Rohs Status: Details

PICmicro MID-RANGE MCU FAMILY
23.1
Figure 23-1:
DS31023A-page 23-2
Converter
10-bit
Introduction
A/D
10-bit A/D Block Diagram
Reference
voltage
The analog-to-digital (A/D) converter module can have up to eight analog inputs for a device.
The analog input charges a sample and hold capacitor. The output of the sample and hold capac-
itor is the input into the converter. The converter then generates a digital result of this analog level
via successive approximation. This A/D conversion, of the analog input signal, results in a corre-
sponding 10-bit digital number.
The analog reference voltages (positive and negative supply) are software selectable to either
the device’s supply voltages (AV
pins.
The A/D converter has a unique feature of being able to operate while the device is in SLEEP
mode.
The A/D module has four registers. These registers are:
The ADCON0 register, shown in
ADCON1 register, shown in
can be configured as analog inputs (AN3 and AN2 can also be the voltage references) or as dig-
ital I/O.
• A/D Result High Register (ADRESH)
• A/D Result Low Register (ADRESL)
• A/D Control Register0 (ADCON0)
• A/D Control Register1 (ADCON1)
V
V
REF
REF
-
+
(Input voltage)
V
AIN
PCFG0
Preliminary
Figure
DD
AV
Figure
, AVss) or the voltage level on the AN3/V
23-2, configures the functions of the port pins. The port pins
DD
AV
23-1, controls the operation of the A/D module. The
SS
CHS2:CHS0
111
110
101
100
011
010
001
000
1997 Microchip Technology Inc.
REF
AN1
AN7
AN6
AN5
AN4
AN3
AN2
AN0
+ and AN2/V
REF
-