PIC18F442-I/PT Microchip Technology Inc., PIC18F442-I/PT Datasheet - Page 37
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PIC18F442-I/PT
Manufacturer Part Number
PIC18F442-I/PT
Description
Microcontroller; 16 KB Flash; 768 RAM; 256 EEPROM; 36 I/O; 40-Pin-TQFP
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F442-IPT.pdf
(332 pages)
Specifications of PIC18F442-I/PT
A/d Inputs
8-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
256 Bytes
Input Output
36
Interface
I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
44-pin TQFP
Programmable Memory
16K Bytes
Ram Size
768 Bytes
Speed
40 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F442-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:
• Program Memory
• Data RAM
• Data EEPROM
Data and program memory use separate busses,
which allows for concurrent access of these blocks.
Additional detailed information for FLASH program
memory and Data EEPROM is provided in Section 5.0
and Section 6.0, respectively.
4.1
A 21-bit program counter is capable of addressing the
2-Mbyte program memory space. Accessing a location
between the physically implemented memory and the
2-Mbyte address will cause a read of all ’0’s (a NOP
instruction).
The PIC18F252 and PIC18F452 each have 32 Kbytes
of FLASH memory, while the PIC18F242 and
PIC18F442 have 16 Kbytes of FLASH. This means that
PIC18FX52 devices can store up to 16K of single word
instructions, and PIC18FX42 devices can store up to
8K of single word instructions.
The RESET vector address is at 0000h and the
interrupt vector addresses are at 0008h and 0018h.
Figure 4-1 shows the Program Memory Map for
PIC18F242/442 devices and Figure 4-2 shows the
Program Memory Map for PIC18F252/452 devices.
© 2006 Microchip Technology Inc.
MEMORY ORGANIZATION
Program Memory Organization
PIC18FXX2
DS39564C-page 35
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