PIC18F4420T-I/PT Microchip Technology, PIC18F4420T-I/PT Datasheet - Page 32

• Manufacturer Part Number: PIC18F4420T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4420T-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F2XXX/4XXX FAMILY
TABLE 5-3:
DS39622L-page 32
USBDIV
CPUDIV<1:0>
PLLDIV<2:0>
VREGEN
BORV<1:0>
BOREN<1:0>
PWRTEN
Note 1:
Bit Name
2:
The BBSIZ bits, BBSIZ<1:0> and BBSIZ<2:1> bits, cannot be changed once any of the following
code-protect bits are enabled: CPB or CP0, WRTB or WRT0, EBTRB or EBTR0.
Not available in PIC18FXX8X and PIC18F2450/4450 devices.
PIC18F2XXX/4XXX FAMILY BIT DESCRIPTIONS (CONTINUED)
Configuration
CONFIG1L
CONFIG1L
CONFIG1L
CONFIG2L
CONFIG2L
CONFIG2L
CONFIG2L
Words
USB Clock Selection bit 
(PIC18F2455/2550/4455/4550, PIC18F2458/2553/4458/4553 and
PIC18F2450/4450 devices only)
Selects the clock source for full-speed USB operation:
1 = USB clock source comes from the 96 MHz PLL divided by 2
0 = USB clock source comes directly from the OSC1/OSC2 oscillator block; 
CPU System Clock Selection bits 
(PIC18F2455/2550/4455/4550, PIC18F2458/2553/4458/4553 and
PIC18F2450/4450 devices only)
11 = CPU system clock divided by 4
10 = CPU system clock divided by 3
01 = CPU system clock divided by 2
00 = No CPU system clock divide
Oscillator Selection bits 
(PIC18F2455/2550/4455/4550, PIC18F2458/2553/4458/4553 and
PIC18F2450/4450 devices only)
Divider must be selected to provide a 4 MHz input into the 96 MHz PLL:
111 = Oscillator divided by 12 (48 MHz input)
110 = Oscillator divided by 10 (40 MHz input)
101 = Oscillator divided by 6 (24 MHz input)
100 = Oscillator divided by 5 (20 MHz input)
011 = Oscillator divided by 4 (16 MHz input)
010 = Oscillator divided by 3 (12 MHz input)
001 = Oscillator divided by 2 (8 MHz input)
000 = No divide – oscillator used directly (4 MHz input)
USB Voltage Regulator Enable bit 
(PIC18F2455/2550/4455/4550, PIC18F2458/2553/4458/4553 and
PIC18F2450/4450 devices only)
1 = USB voltage regulator is enabled
0 = USB voltage regulator is disabled
Brown-out Reset Voltage bits
11 = V
10 = V
01 = V
00 = V
Brown-out Reset Enable bits
11 = Brown-out Reset is enabled in hardware only (SBOREN is disabled)
10 = Brown-out Reset is enabled in hardware only and disabled in Sleep mode
01 = Brown-out Reset is enabled and controlled by software (SBOREN is
00 = Brown-out Reset is disabled in hardware and software
Power-up Timer Enable bit
1 = PWRT is disabled
0 = PWRT is enabled
no divide
SBOREN is disabled)
enabled)
BOR
BOR
BOR
BOR
is set to 2.0V
is set to 2.7V
is set to 4.2V
is set to 4.5V
Description
 2010 Microchip Technology Inc.