PIC18LF448-I/PT Microchip Technology, PIC18LF448-I/PT Datasheet - Page 39
![IC PIC MCU FLASH 8KX16 44TQFP](/photos/6/82/68251/c04-076_pt_sml.jpg)
PIC18LF448-I/PT
Manufacturer Part Number
PIC18LF448-I/PT
Description
IC PIC MCU FLASH 8KX16 44TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18LF242-ISO.pdf
(36 pages)
2.PIC18F248-ISO.pdf
(402 pages)
3.PIC18F248-ISO.pdf
(8 pages)
Specifications of PIC18LF448-I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
33
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)
2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
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:
PIC18LF448-I/PT
Manufacturer:
Microchip Technology
Quantity:
135
Company:
Part Number:
PIC18LF448-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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4.0
There are three memory blocks in Enhanced MCU
devices. These memory blocks are:
• Enhanced Flash Program Memory
• Data Memory
• EEPROM Data Memory
Data and program memory use separate busses,
which allows concurrent access of these blocks.
Additional detailed information on data EEPROM and
Flash program memory is provided in Section 5.0
“Data EEPROM Memory” and Section 6.0 “Flash
Program Memory”, respectively.
4.1
The PIC18F258/458 devices have a 21-bit program
counter that is capable of addressing a 2-Mbyte
program memory space.
The Reset vector address is at 0000h and the interrupt
vector addresses are at 0008h and 0018h.
FIGURE 4-1:
© 2006 Microchip Technology Inc.
CALL,RCALL,RETURN
RETFIE,RETLW
MEMORY ORGANIZATION
Program Memory Organization
High Priority Interrupt Vector 0008h
Low Priority Interrupt Vector
Program Memory
Stack Level 31
Stack Level 1
Reset Vector
PC<20:0>
Read ‘0’
On-Chip
PROGRAM MEMORY MAP
AND STACK FOR
PIC18F248/448
21
0000h
0018h
3FFFh
4000h
1FFFFFh
200000h
Figure 4-1 shows the diagram for program memory
map and stack for the PIC18F248 and PIC18F448.
Figure 4-2 shows the diagram for the program memory
map and stack for the PIC18F258 and PIC18F458.
4.1.1
The PIC18F258 and the PIC18F458 have 32 Kbytes of
internal Enhanced Flash program memory. This means
that the PIC18F258 and the PIC18F458 can store up to
16K of single-word instructions. The PIC18F248 and
PIC18F448 have 16 Kbytes of Enhanced Flash
program memory. This translates into 8192 single-word
instructions, which can be stored in the program
memory. Accessing a location between the physically
implemented memory and the 2-Mbyte address will
cause a read of all ‘0’s (a NOP instruction).
FIGURE 4-2:
CALL,RCALL,RETURN
RETFIE,RETLW
High Priority Interrupt Vector 0008h
Low Priority Interrupt Vector
INTERNAL PROGRAM MEMORY
OPERATION
Program Memory
Stack Level 31
Stack Level 1
Reset Vector
PC<20:0>
Read ‘0’
On-Chip
PROGRAM MEMORY MAP
AND STACK FOR
PIC18F258/458
PIC18FXX8
21
DS41159E-page 37
0000h
0018h
7FFFh
8000h
1FFFFFh
200000h
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