PIC18F4580-I/P Microchip Technology Inc., PIC18F4580-I/P Datasheet - Page 203

• Manufacturer Part Number: PIC18F4580-I/P
• Description: 40 PIN, 32 KB FLASH, 1536 RAM, 36 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4580-I/P

• A/d Inputs: 11-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 36
• Interface: CAN/I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 32K Bytes
• Ram Size: 1.5K 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 Electrostatic Device

19.2
There are many control and data registers associated
with the CAN module. For convenience, their
descriptions have been grouped into the following
sections:
• Control and Status Registers
• Transmit Buffer Registers (Data and Control)
• Receive Buffer Registers (Data and Control)
• Baud Rate Control Registers
• I/O Control Register
• Interrupt Status and Control Registers
REGISTER 19-1:
 2004 Microchip Technology Inc.
Note:
CAN Module Registers
bit 7-5
bit 4
bit 3-1
bit 0
Not all CAN registers are available in the
Access Bank.
CANCON: CAN CONTROL REGISTER
bit 7
REQOP2:REQOP0: Request CAN Operation Mode bits
1xx = Request Configuration mode
011 = Request Listen Only mode
010 = Request Loopback mode
001 = Request Disable mode
000 = Request Normal mode
ABAT: Abort All Pending Transmissions bit
1 = Abort all pending transmissions (in all transmit buffers)
0 = Transmissions proceeding as normal
WIN2:WIN0: Window Address bits
This selects which of the CAN buffers to switch into the Access Bank area. This allows access
to the buffer registers from any data memory bank. After a frame has caused an interrupt, the
ICODE2:ICODE0 bits can be copied to the WIN2:WIN0 bits to select the correct buffer. See
Example 19-1 for code example.
111 = Receive Buffer 0
110 = Receive Buffer 0
101 = Receive Buffer 1
100 = Transmit Buffer 0
011 = Transmit Buffer 1
010 = Transmit Buffer 2
001 = Receive Buffer 0
000 = Receive Buffer 0
Unimplemented: Read as ‘0’
Legend:
R = Readable bit
-n = Value at POR
REQOP2
R/W-1
REQOP1
R/W-0
REQOP0
W = Writable bit
‘1’ = Bit is set
R/W-0
R/W-0
ABAT
19.2.1
The registers described in this section control the
overall operation of the CAN module and show its
operational status.
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
WIN2
CAN CONTROL AND STATUS
REGISTERS
R/W-0
WIN1
PIC18FXX8
x = Bit is unknown
R/W-0
WIN0
DS41159D-page 201
U-0
—
bit 0