PIC16C781-I/P Microchip Technology, PIC16C781-I/P Datasheet - Page 71

• Manufacturer Part Number: PIC16C781-I/P
• Description: IC MCU OTP 1KX14 W/AD COMP 20DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C781-I/P

• Core Size: 8-Bit
• Program Memory Size: 1.75KB (1K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x8b; D/A 1x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Controller Family/series: PIC16C
• No. Of I/o's: 16
• Ram Memory Size: 128Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 2
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• On-chip Dac: 8 bit, 1 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGDVA16XP202 - ADAPTER DEVICE PIC16C781/782DM163012 - BOARD DEMO PICDEM FOR 16C781/782AC164028 - MODULE SKT PROMATEII 20SOIC/DIP
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details
• Other names: PIC16C781I/P

9.0
The 8-bit ADC module, shown in Figure 9-1, has 10
inputs in the PIC16C781/782:
• 8 external channels, AN<7:0> (RA<3:0> and
• 2 internal channels, V
The ADC allows conversion of an analog input signal to
a corresponding 8-bit digital value. The desired chan-
nel is connected to a Sample-and-Hold by the input
multiplexers. The output of the Sample-and-Hold cap-
FIGURE 9-1:
RB<3:0>)
2001 Microchip Technology Inc.
RB0/INT/AN4/V
RA2/AN2/V
RA3/AN3/V
RA0/AN0/OPA+
RA1/AN1/OPA-
RB1/AN5/V
RB3/AN7/OPA
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
RB2/AN6
REF
REF
DAC
2
1
R
ADC MODULE BLOCK DIAGRAM
R
and V
DAC
0
1
2
3
4
5
6
7
8
9
Preliminary
VOLTAGE COMPARATOR MODULE
OPA MODULE
4
DAC MODULE
AV
V
V
V
V
REF
R
DAC
R
tures a snapshot of the voltage and holds it for the
ADC. The ADC then generates the 8-bit result via suc-
cessive approximation.
The analog reference voltage (ADC
selectable from the following options:
• The analog positive supply: AV
• The reference input for Comparator C1: V
• The Voltage Reference module output: V
• The DAC Converter module output: V
The ADC has the unique feature of being able to oper-
ate while the device is in SLEEP mode. To operate in
SLEEP, the ADC conversion clock must be derived
from the ADC’s dedicated internal RC oscillator.
DD
MODULE
CHS<3:0>
1
0
1
2
3
PIC16C781/782
VCFG<1:0>
GO/DONE
ADON
Sample
Hold
and
ADC
DD
ADC
REF
DS41171A-page 69
REF
DAC
) is software
R
REF
8
1