PIC16C781-I/P Microchip Technology, PIC16C781-I/P Datasheet - Page 76

• 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

PIC16C781/782
FIGURE 9-2:
9.4
Example 9-2 demonstrates an ADC conversion. The
RA0/AN0 pin is configured as the analog input. The ref-
erence voltage selected is the device AV
interrupt is enabled, and the ADC conversion clock is
ADRC.
Clearing the GO/DONE bit during a conversion aborts
the current conversion. The ADRES register is NOT
updated with the partially completed ADC conversion
sample. That is, the ADRES register continues to con-
tain the value of the last completed conversion (or the
last value written to the ADRES register). After the ADC
conversion is aborted, a 2T
before the next acquisition is started. After this 2T
wait period, an acquisition is automatically started on
the selected channel.
DS41171A-page 74
ADC Configuration and
Conversion
Legend: C
VA
ANALOG INPUT MODEL
R
V
I
R
SS
C
S
LEAKAGE
T
PIN
IC
HOLD
AD
ANx
CPIN
5 pF
wait period is required
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch
= sample/hold capacitance (from DAC)
various junctions
DD
. The ADC
V
DD
V
V
T
T
Preliminary
= 0.6V
= 0.6V
AD
I
± 500 nA
LEAKAGE
EXAMPLE 9-2:
;********************************************
;*
;*
;*
;*
;*
;*
;*
;********************************************
;*
;*
;*
ADC_CNVRT
ADC_CN_LOOP
R
IC
This code block will configure the ADC
Conversion start & wait for complete
for polling, AVDD as reference, RC clock
and RA0 input.
polling code included.
minimum acquisition delay from
configuration.
BANKSEL
CLRF
BSF
BSF
BANKSEL
MOVLW
MOVWF
Start & Wait for ADC complete, assumes
BANKSEL
BSF
BTFSC
GOTO
MOVF
1k
V
SS R
DD
Sampling
Switch
6V
5V
4V
3V
2V
SS
ADCON1
ADCON1
TRISA,0
ANSEL,0
ADCON0
B’11000001’
ADCON0
ADCON0
ADCON0,GO
ADCON0,GO
ADC_CN_LOOP ; If not, wait
ADRES,W
Sampling Switch
5 6 7 8 9 10 11
ADC CONVERSION
V
SS
C
= DAC capacitance
= 51.2 pF
( k
HOLD
2001 Microchip Technology Inc.
)
; Select Bank 1
; AVDD as VREF
; Set RA0 as input
; Set RA0 as analog
; Select Bank0
; RC, Ch 0, ADC on
; Select Bank 0
; Start convert
; Test for end
; Get result