PIC18F442-E/P Microchip Technology, PIC18F442-E/P Datasheet - Page 51
![IC MCU CMOS 40MHZ 8K FLASH 40DIP](/photos/6/61/66192/150-40-dip_sml.jpg)
PIC18F442-E/P
Manufacturer Part Number
PIC18F442-E/P
Description
IC MCU CMOS 40MHZ 8K FLASH 40DIP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18F242-ISO.pdf
(332 pages)
3.PIC18F242-ISO.pdf
(14 pages)
4.PIC18F242-ISO.pdf
(16 pages)
5.PIC18F242-ISO.pdf
(16 pages)
6.PIC18F242-ISO.pdf
(14 pages)
7.PIC18LF242-ISO.pdf
(36 pages)
Specifications of PIC18F442-E/P
Core Size
8-Bit
Program Memory Size
16KB (8K x 16)
Core Processor
PIC
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
34
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 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
40-DIP (0.600", 15.24mm)
Controller Family/series
PIC18
No. Of I/o's
34
Eeprom Memory Size
256Byte
Ram Memory Size
768Byte
Cpu Speed
40MHz
No. Of Timers
4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DVA18XP400 - DEVICE ADAPTER 18F4220 PDIP 40LDACICE0206 - ADAPTER MPLABICE 40P 600 MIL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F442-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC18F242-ISO PDF datasheet #2
- PIC18F242-ISO PDF datasheet #3
- PIC18F242-ISO PDF datasheet #4
- PIC18F242-ISO PDF datasheet #5
- PIC18F242-ISO PDF datasheet #6
- PIC18LF242-ISO PDF datasheet #7
- Current page: 51 of 332
- Download datasheet (6Mb)
4.10
The Access Bank is an architectural enhancement
which is very useful for C compiler code optimization.
The techniques used by the C compiler may also be
useful for programs written in assembly.
This data memory region can be used for:
• Intermediate computational values
• Local variables of subroutines
• Faster context saving/switching of variables
• Common variables
• Faster evaluation/control of SFRs (no banking)
The Access Bank is comprised of the upper 128 bytes
in Bank 15 (SFRs) and the lower 128 bytes in Bank 0.
These two sections will be referred to as Access RAM
High and Access RAM Low, respectively. Figure 4-6
and Figure 4-7 indicate the Access RAM areas.
A bit in the instruction word specifies if the operation is
to occur in the bank specified by the BSR register or in
the Access Bank. This bit is denoted by the ’a’ bit (for
access bit).
When forced in the Access Bank (a = 0), the last
address in Access RAM Low is followed by the first
address in Access RAM High. Access RAM High maps
the Special Function registers, so that these registers
can be accessed without any software overhead. This is
useful for testing status flags and modifying control bits.
FIGURE 4-8:
© 2006 Microchip Technology Inc.
Note 1: For register file map detail, see Table 4-1.
Bank Select
Access Bank
2: The access bit of the instruction can be used to force an override of the selected bank (BSR<3:0>) to the
3: The MOVFF instruction embeds the entire 12-bit address in the instruction.
registers of the Access Bank.
BSR<3:0>
(2)
DIRECT ADDRESSING
Location Select
7
Data
Memory
From Opcode
(1)
(3)
Direct Addressing
(3)
000h
0FFh
Bank 0
00h
4.11
The need for a large general purpose memory space
dictates a RAM banking scheme. The data memory is
partitioned into sixteen banks. When using direct
addressing, the BSR should be configured for the
desired bank.
BSR<3:0> holds the upper 4 bits of the 12-bit RAM
address. The BSR<7:4> bits will always read ’0’s, and
writes will have no effect.
A MOVLB instruction has been provided in the
instruction set to assist in selecting banks.
If the currently selected bank is not implemented, any
read will return all '0's and all writes are ignored. The
STATUS register bits will be set/cleared as appropriate
for the instruction performed.
Each Bank extends up to FFh (256 bytes). All data
memory is implemented as static RAM.
A MOVFF instruction ignores the BSR, since the 12-bit
addresses are embedded into the instruction word.
Section 4.12 provides a description of indirect address-
ing, which allows linear addressing of the entire RAM
space.
0
100h
1FFh
Bank 1
01h
Bank Select Register (BSR)
PIC18FXX2
E00h
EFFh
Bank 14
0Eh
DS39564C-page 49
F00h
FFFh
Bank 15
0Fh
Related parts for PIC18F442-E/P
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![PIC18F452I/L](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC, 8BIT MCU, PIC18F, 40MHZ, LCC-44
Manufacturer:
Microchip Technology
Datasheet:
![PIC18LF8680-I/PT](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC, 8BIT MCU, PIC18LF, 40MHZ, PLCC-64
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F85K22-I/PT](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC, 8BIT MCU, PIC18F, 64MHZ, TQFP-80
Manufacturer:
Microchip Technology
Datasheet:
![AC164130-2](/photos/15/88/158849/ac164130_tmb.jpg)
Part Number:
Description:
MCU, MPU & DSP Development Tools CAN/LIN PICtail Plus Daughter Board
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F46K20-E/P](/photos/6/61/66192/150-40-dip_tmb.jpg)
Part Number:
Description:
IC, 8BIT MCU, PIC18F, 64MHZ, DIP-40
Manufacturer:
Microchip Technology
Datasheet:
![PIC18LF6680-I/L](/photos/12/13/121323/c04-049_l_tmb.jpg)
Part Number:
Description:
IC, 8BIT MCU, PIC18LF, 40MHZ, PLCC-64
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F66K90-I/PT](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC, 8BIT MCU, PIC18F, 64MHZ, TQFP-64
Manufacturer:
Microchip Technology
![PIC18F85K90-I/PT](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC, 8BIT MCU, PIC18F, 64MHZ, TQFP-80
Manufacturer:
Microchip Technology
![PIC18F43K20-E/MV](/photos/16/15/161538/qfn-40_tmb.jpg)
Part Number:
Description:
8KB, Flash, 768bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm TUB
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F43K20-I/MV](/photos/16/15/161538/qfn-40_tmb.jpg)
Part Number:
Description:
8KB, Flash, 768bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm TUB
Manufacturer:
Microchip Technology
![PIC18F44K20-E/MV](/photos/16/15/161538/qfn-40_tmb.jpg)
Part Number:
Description:
16KB, Flash, 768bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm TU
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F44K20-I/MV](/photos/16/15/161538/qfn-40_tmb.jpg)
Part Number:
Description:
16KB, Flash, 768bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm TU
Manufacturer:
Microchip Technology
![PIC18F45K20-E/MV](/photos/16/15/161538/qfn-40_tmb.jpg)
Part Number:
Description:
32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm T
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F45K20-I/MV](/photos/16/15/161538/qfn-40_tmb.jpg)
Part Number:
Description:
32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm T
Manufacturer:
Microchip Technology
![PIC18F46K20-E/MV](/photos/16/15/161538/qfn-40_tmb.jpg)
Part Number:
Description:
64KB, Flash, 3968bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm T
Manufacturer:
Microchip Technology
Datasheet: