PIC18F45K20-E/P Microchip Technology, PIC18F45K20-E/P Datasheet - Page 50

• Manufacturer Part Number: PIC18F45K20-E/P
• Description: 32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 PDIP .600in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F45K20-E/P

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DM240313 - BOARD DEMO 8BIT XLPAC164112 - VOLTAGE LIMITER MPLAB ICD2 VPPDM164124 - KIT STARTER FOR PIC18F4XK20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICkit™ 3 Debug Express
DS41370C-page 46
#2: The VCFGx bits in ADCON1 can select the ADC voltage references to use the AN2
and AN3 pins, V
have voltage references connected to AN2 and AN3, the ADC will be referenced to V
and V
‘1023’ corresponds to about 3.3 Volts, or V
ADCON1 setting for this lesson is
ADCON1 = 0;
FIGURE 3-37:
#3: The ADC clock should be set as short as possible but still greater than the minimum
period “TAD” time, data sheet parameter 130. The minimum TAD time for the
PIC18F45K20 (as of this writing) is
1.4us. At a 1 MHz oscillator F
clock. One clock period 1/500kHz = 2us, which is greater than the minimum TAD =
1.4us. Thus ADCSx = ‘000’.
SS
. This means an ADC result of ‘0’ corresponds to 0 Volts, or V
DD
and V
ADCON2: A/D CONTROL REGISTER 2
SS
, or some combination. Since the demo board does not
OSC
, selecting bits ADCS = F
DD
. Including the values from #1, the
OSC
© 2009 Microchip Technology Inc.
/2 gives a 500 kHz ADC
SS
. A result of
DD