PIC18F4420T-I/PT Microchip Technology, PIC18F4420T-I/PT Datasheet - Page 50
PIC18F4420T-I/PT
Manufacturer Part Number
PIC18F4420T-I/PT
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18F2221-ISO.pdf
(46 pages)
2.PIC18F2420-IML.pdf
(412 pages)
3.PIC18F2420-IML.pdf
(16 pages)
4.PIC18F2420-IML.pdf
(8 pages)
5.PIC18F2420-IML.pdf
(6 pages)
6.PIC18F2420-IML.pdf
(8 pages)
7.PIC18F2420-IML.pdf
(4 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F4420T-I/PT
Manufacturer:
MICROCHIP
Quantity:
4 000
Company:
Part Number:
PIC18F4420T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC18F2221-ISO PDF datasheet
- PIC18F2420-IML PDF datasheet #2
- PIC18F2420-IML PDF datasheet #3
- PIC18F2420-IML PDF datasheet #4
- PIC18F2420-IML PDF datasheet #5
- PIC18F2420-IML PDF datasheet #6
- PIC18F2420-IML PDF datasheet #7
- Current page: 50 of 412
- Download datasheet (7Mb)
PIC18F2420/2520/4420/4520
4.6
Most registers are unaffected by a Reset. Their status
is unknown on POR and unchanged by all other
Resets. The other registers are forced to a “Reset
state” depending on the type of Reset that occurred.
Most registers are not affected by a WDT wake-up,
since this is viewed as the resumption of normal oper-
ation. Status bits from the RCON register, RI, TO, PD,
POR and BOR, are set or cleared differently in different
Reset situations, as indicated in Table 4-3. These bits
are used in software to determine the nature of the
Reset.
TABLE 4-3:
DS39631E-page 48
Power-on Reset
RESET Instruction
Brown-out Reset
MCLR Reset during Power-Managed
Run Modes
MCLR Reset during Power-Managed
Idle Modes and Sleep Mode
WDT Time-out during Full Power or
Power-Managed Run Mode
MCLR Reset during Full-Power
Execution
Stack Full Reset (STVREN = 1)
Stack Underflow Reset (STVREN = 1)
Stack Underflow Error (not an actual
Reset, STVREN = 0)
WDT Time-out during
Power-Managed Idle or Sleep Modes
Interrupt Exit from Power-Managed
Modes
Legend: u = unchanged
Note 1:
Reset State of Registers
When the wake-up is due to an interrupt and the GIEH or GIEL bits are set, the PC is loaded with the
interrupt vector (008h or 0018h).
Condition
STATUS BITS, THEIR SIGNIFICANCE AND THE INITIALIZATION CONDITION
FOR RCON REGISTER
Program
PC + 2
Counter
PC + 2
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
(1)
RI
1
0
1
u
u
u
u
u
u
u
u
u
Table 4-4 describes the Reset states for all of the
Special Function Registers. These are categorized by
Power-on and Brown-out Resets, Master Clear and
WDT Resets and WDT wake-ups.
TO
RCON Register
1
u
1
1
1
0
u
u
u
u
0
u
PD
1
u
1
u
0
u
u
u
u
u
0
0
POR
0
u
u
u
u
u
u
u
u
u
u
u
BOR
0
u
0
u
u
u
u
u
u
u
u
u
© 2008 Microchip Technology Inc.
STKFUL
STKPTR Register
0
u
u
u
u
u
u
1
u
u
u
u
STKUNF
0
u
u
u
u
u
u
u
1
1
u
u
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