PIC16F72-I/SO Microchip Technology, PIC16F72-I/SO Datasheet - Page 55

• Manufacturer Part Number: PIC16F72-I/SO
• Description: IC PIC MCU FLASH 2KX14 28-SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F72-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 28-SOIC (7.5mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• 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
• 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: ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5-ch x 8-bit
• Package: 28SOIC W
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

10.0
The analog-to-digital (A/D) converter module has five
inputs for the PIC16F72.
The A/D allows conversion of an analog input signal to
a corresponding 8-bit digital number. The output of the
sample and hold is the input into the converter, which
generates the result via successive approximation. The
analog reference voltage is software selectable to
either the device’s positive supply voltage (V
voltage level on the RA3/AN3/V
The A/D converter has a unique feature of being able
to operate while the device is in SLEEP mode. To oper-
ate in SLEEP, the A/D conversion clock must be
derived from the A/D’s internal RC oscillator.
REGISTER 10-1:
 2002 Microchip Technology Inc.
ANALOG-TO-DIGITAL
CONVERTER (A/D) MODULE
bit 7-6
bit 5-3
bit 2
bit 1
bit 0
ADCON0: A/D CONTROL REGISTER 0 (ADDRESS 1Fh)
bit 7
ADCS<1:0>: A/D Conversion Clock Select bits
00 = F
01 = F
10 = F
11 = F
CHS<2:0>: Analog Channel Select bits
000 = Channel 0, (RA0/AN0)
001 = Channel 1, (RA1/AN1)
010 = Channel 2, (RA2/AN2)
011 = Channel 3, (RA3/AN3)
100 = Channel 4, (RA5/AN4)
GO/DONE: A/D Conversion Status bit
If ADON = 1:
1 = A/D conversion in progress (setting this bit starts the A/D conversion)
0 = A/D conversion not in progress (this bit is automatically cleared by hardware when the A/D
Unimplemented: Read as ‘0’
ADON: A/D On bit
1 = A/D converter module is operating
0 = A/D converter module is shut-off and consumes no operating current
Legend:
R = Readable bit
- n = Value at POR
ADCS1
R/W-0
conversion is complete)
OSC
OSC
OSC
RC
REF
(clock derived from the internal A/D module RC oscillator)
/2
/8
/32
pin.
ADCS0
R/W-0
DD
) or the
R/W-0
CHS2
W = Writable bit
‘1’ = Bit is set
R/W-0
CHS1
The A/D module has three registers:
• A/D Result Register
• A/D Control Register 0
• A/D Control Register 1
A device RESET forces all registers to their RESET
state. This forces the A/D module to be turned off and
any conversion is aborted.
The ADCON0 register, shown in Register 10-1, con-
trols the operation of the A/D module. The ADCON1
register, shown in Register 10-2, configures the func-
tions of the port pins. The port pins can be configured
as analog inputs (RA3 can also be a voltage reference)
or a digital I/O.
For more information on use of the A/D Converter, see
AN546 - Use of A/D Converter, or refer to the
PICmicro™ Mid-Range MCU Family Reference
Manual (DS33023).
R/W-0
CHS0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
GO/DONE
R/W-0
PIC16F72
ADRES
ADCON0
ADCON1
x = Bit is unknown
DS39597B-page 53
U-0
—
ADON
R/W-0
bit 0