PIC18F25K80T-I/MM Microchip Technology, PIC18F25K80T-I/MM Datasheet - Page 449
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PIC18F25K80T-I/MM
Manufacturer Part Number
PIC18F25K80T-I/MM
Description
ECAN, 32KB Flash, 4KB RAM, 16 MIPS, 12-bit ADC, CTMU 28 QFN-S 6x6mm T/R
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F25K80-ISO.pdf
(628 pages)
Specifications of PIC18F25K80T-I/MM
Core Processor
PIC
Core Size
8-Bit
Speed
64MHz
Connectivity
ECAN, I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
24
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
3.6K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Processor Series
PIC18F25K80
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3648 B
Interface Type
I2C, SPI
Maximum Clock Frequency
64 MHz
Number Of Programmable I/os
24
Number Of Timers
5
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Quantity
Price
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Part Number:
PIC18F25K80T-I/MM
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MICROCHIP
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In Mode 1 and 2, there are an additional 10 acceptance
filters, RXF6-RXF15, creating a total of 16 available
filters. RXF15 can be used either as an acceptance
filter or acceptance mask register. Each of these
acceptance filters can be individually enabled or
disabled by setting or clearing the RXFENn bit in the
RXFCONn register. Any of these 16 acceptance filters
can be dynamically associated with any of the receive
buffers. Actual association is made by setting the
appropriate bits in the RXFBCONn register. Each
RXFBCONn register contains a nibble for each filter.
This nibble can be used to associate a specific filter to
any of available receive buffers. User firmware may
associate more than one filter to any one specific
receive buffer.
In addition to dynamic filter to buffer association, in
Mode 1 and 2, each filter can also be dynamically asso-
ciated to available Acceptance Mask registers. The
FILn_m bits in the MSELn register can be used to link
a specific acceptance filter to an acceptance mask reg-
ister. As with filter to buffer association, one can also
associate more than one mask to a specific acceptance
filter.
When a filter matches and a message is loaded into the
receive buffer, the filter number that enabled the
message reception is loaded into the FILHIT bit(s). In
Mode 0 for RXB1, the RXB1CON register contains the
FILHIT<2:0> bits. They are coded as follows:
• 101 = Acceptance Filter 5 (RXF5)
• 100 = Acceptance Filter 4 (RXF4)
• 011 = Acceptance Filter 3 (RXF3)
• 010 = Acceptance Filter 2 (RXF2)
• 001 = Acceptance Filter 1 (RXF1)
• 000 = Acceptance Filter 0 (RXF0)
FIGURE 27-3:
2011 Microchip Technology Inc.
Note:
RXFn
‘ 000 ’ and ‘ 001 ’ can only occur if the
RXB0DBEN bit is set in the RXB0CON
register, allowing RXB0 messages to
rollover into RXB1.
0
Acceptance Filter Register
Message Assembly Buffer
RXFn
Identifier
MESSAGE ACCEPTANCE MASK AND FILTER OPERATION
1
RXFn
n
RXMn
Preliminary
0
Acceptance Mask Register
PIC18F66K80 FAMILY
RXMn
The coding of the RXB0DBEN bit enables these three
bits to be used similarly to the FILHIT bits and to distin-
guish a hit on filter, RXF0 and RXF1, in either RXB0 or
after a rollover into RXB1.
• 111 = Acceptance Filter 1 (RXF1)
• 110 = Acceptance Filter 0 (RXF0)
• 001 = Acceptance Filter 1 (RXF1)
• 000 = Acceptance Filter 0 (RXF0)
If the RXB0DBEN bit is clear, there are six codes
corresponding to the six filters. If the RXB0DBEN bit is
set, there are six codes corresponding to the six filters,
plus two additional codes corresponding to RXF0 and
RXF1 filters, that rollover into RXB1.
In Mode 1 and 2, each buffer control register contains
5 bits of filter hit bits (FILHIT<4:0>). A binary value of ‘ 0 ’
indicates a hit from RXF0 and 15 indicates RXF15.
If more than one acceptance filter matches, the FILHIT
bits will encode the binary value of the lowest num-
bered filter that matched. In other words, if filter RXF2
and filter RXF4 match, FILHIT will be loaded with the
value for RXF2. This essentially prioritizes the
acceptance filters with a lower number filter having
higher priority. Messages are compared to filters in
ascending order of filter number.
The mask and filter registers can only be modified
when the PIC18F66K80 family devices are in
Configuration mode.
1
RXMn
n
DS39977C-page 449
RxRqst
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