PIC18F4420T-I/PT Microchip Technology, PIC18F4420T-I/PT Datasheet - Page 347

• 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

FIGURE 26-8:
FIGURE 26-9:
TABLE 26-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
© 2008 Microchip Technology Inc.
Param.
30
31
32
33
34
35
36
37
38
39
No.
Watchdog
Note:
Time-out
Time-out
I/O pins
Internal
Internal
PWRT
MCLR
Reset
Timer
Reset
Internal Reference
Reference Voltage
TmcL
T
T
T
T
T
T
T
T
T
POR
OSC
Symbol
V
OST
CSD
WDT
PWRT
IOZ
BOR
IRVST
LVD
IOBST
DD
Enable Internal
Voltage Stable
Refer to Figure 26-5 for load conditions.
AND BROWN-OUT RESET REQUIREMENTS
MCLR Pulse Width (low)
Watchdog Timer Time-out Period
(no postscaler)
Oscillation Start-up Timer Period
Power-up Timer Period
I/O High-Impedance from MCLR
Low or Watchdog Timer Reset
Brown-out Reset Pulse Width
Time for Internal Reference
Voltage to become Stable
High/Low-Voltage Detect Pulse Width
CPU Start-up Time
Time for INTOSC to Stabilize
V
IRVST
V
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER TIMING
BROWN-OUT RESET TIMING
DD
33
Characteristic
32
PIC18F2420/2520/4420/4520
36
BV
1024 T
DD
55.6
Min
200
200
3.4
—
—
—
—
2
OSC
34
65.5
30
Typ
4.1
20
10
—
—
—
—
2
1
1024 T
35
Max
4.71
75.4
50
—
—
—
—
—
—
OSC
31
Units
ms
ms
μs
—
μs
μs
μs
μs
μs
μs
T
V
V
OSC
DD
DD
DS39631E-page 345
34
≤ B
≤ V
= OSC1 period
Conditions
VDD
LVD
(see D005)