PIC16F887-E/P Microchip Technology Inc., PIC16F887-E/P Datasheet - Page 101

• Manufacturer Part Number: PIC16F887-E/P
• Description: 40 PIN, 14KB FLASH, 368 RAM, 36 I/O, PDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F887-E/P

• A/d Inputs: 14-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Frequency: 20 MHz
• Input Output: 35
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 14K Bytes
• Ram Size: 368 Bytes
• Resistance, Drain To Source On: Bytes
• Serial Interface: MSSP or EUSART
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

9.0
The
conversion of an analog input signal to a 10-bit binary
representation of that signal. This device uses analog
inputs, which are multiplexed into a single sample and
hold circuit. The output of the sample and hold is
connected to the input of the converter. The converter
generates a 10-bit binary result via successive
approximation and stores the conversion result into the
ADC result registers (ADRESL and ADRESH).
The ADC voltage reference is software selectable to be
either internally generated or externally supplied.
The ADC can generate an interrupt upon completion of
a conversion. This interrupt can be used to wake-up the
device from Sleep.
Figure 9-1 shows the block diagram of the ADC.
FIGURE 9-1:
© 2008 Microchip Technology Inc.
Analog-to-Digital
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
FixedRef
CVREF
AN10
AN12
AN13
AN11
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN8
AN9
ADC BLOCK DIAGRAM
Converter
CHS<3:0>
V
REF
V
REF
-
+
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
(ADC)
AV
SS
AV
DD
GO/DONE
PIC16F882/883/884/886/887
VCFG0 = 0
VCFG0 = 1
VCFG1 = 0
VCFG1 = 1
allows
ADON
V
SS
ADC
ADFM
ADRESH ADRESL
0 = Left Justify
1 = Right Justify
10
10
DS41291E-page 99