PIC16C781-I/P Microchip Technology, PIC16C781-I/P Datasheet - Page 98

• 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 12-4:
EXAMPLE 12-2:
;*
;*
;*
FIGURE 12-5:
DS41171A-page 96
INPUT
VOLTAGE REFERENCE
This code block will configure Comparator
input on AN7, and Reference from the DAC
BANKSEL
BSF
BSF
BANKSEL
CLRF
MOVLW
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
C1 for normal speed and output polarity,
INPUT
TRISA
TRISB,RB3
ANSEL,AN7
DACON0
DAC
B’10000000’ ; Enable, no out
DACON0
DAC_VALUE
DAC
B’10001111’ ; C1; no out,
CM1CON0
RB3/AN7/OPA
CONFIGURATION OF COMPARATOR C1 WITH DAC
PROGRAMMING C1 FOR
PSMC FEEDBACK
WINDOW COMPARATOR WITH INTERRUPT
; Select Bank 1
; RB3 as input
; Set RB3 as analog
; Select Bank 2
; DAC=00h
; DACREF = VDD
; Trip Level
; VREF1, AN7
V
V
REF
REF
AN4
2
1
V
DAC
+
-
DAC
Preliminary
C1
PIC16C78X
+
+
-
-
C2
C1
12.2.3
To form a low power window comparator, Comparators
C1 & C2 are configured as follows:
• Common input RB0/INT/AN4/V
• Separate external reference voltages
• Programmed for slow speed operation
In addition, the output of comparator C2 must be
inverted for common polarity with C1.
A block diagram of the window comparator with exter-
nal connections is shown in Figure 12-4.
PIC16C78X
C1POL = 0
EXAMPLE: LOW POWER WINDOW
COMPARATOR WITH INTERRUPT
C1OUT
CLPOL=1
2001 Microchip Technology Inc.
CM2CON1<6>
CLPOL=0
CM2CON1<7>
PSMC
REF