DSPIC33FJ256MC510A-E/PF Microchip Technology, DSPIC33FJ256MC510A-E/PF Datasheet - Page 219
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DSPIC33FJ256MC510A-E/PF
Manufacturer Part Number
DSPIC33FJ256MC510A-E/PF
Description
16 Bit MCU/DSP 40MIPS 256KB FLASH 100 TQFP 14x14x1mm TRAY
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr
Specifications of DSPIC33FJ256MC510A-E/PF
Core Processor
dsPIC
Core Size
16-Bit
Speed
40 MIPs
Connectivity
CAN, I²C, IrDA, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, Motor Control PWM, QEI, POR, PWM, WDT
Number Of I /o
85
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 24x10b/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
100-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DSPIC33FJ256MC510A-E/PF
Manufacturer:
Microchip Technology
Quantity:
10 000
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21.3
The CAN module can operate in one of several operation
modes selected by the user. These modes include:
• Initialization Mode
• Disable Mode
• Normal Operation Mode
• Listen Only Mode
• Listen All Messages Mode
• Loopback Mode
Modes are requested by setting the REQOP<2:0> bits
(CiCTRL1<10:8>). Entry into a mode is Acknowledged
by monitoring the OPMODE<2:0> bits (CiCTRL1<7:5>).
The module will not change the mode and the OPMODE
bits until a change in mode is acceptable, generally
during bus Idle time, which is defined as at least
11 consecutive recessive bits.
21.3.1
In the Initialization mode, the module will not transmit or
receive. The error counters are cleared and the inter-
rupt flags remain unchanged. The programmer will
have access to Configuration registers that are access
restricted in other modes. The module will protect the
user from accidentally violating the CAN protocol
through programming errors. All registers which control
the configuration of the module can not be modified
while the module is on-line. The CAN module will not
be allowed to enter the Configuration mode while a
transmission is taking place. The Configuration mode
serves as a lock to protect the following registers:
• All Module Control Registers
• Baud Rate and Interrupt Configuration Registers
• Bus Timing Registers
• Identifier Acceptance Filter Registers
• Identifier Acceptance Mask Registers
21.3.2
In Disable mode, the module will not transmit or
receive. The module has the ability to set the WAKIF bit
due to bus activity, however, any pending interrupts will
remain and the error counters will retain their value.
If the REQOP<2:0> bits (CiCTRL1<10:8>) = 001, the
module will enter the Module Disable mode. If the module
is active, the module will wait for 11 recessive bits on the
CAN bus, detect that condition as an Idle bus, then
accept the module disable command. When the
OPMODE<2:0> bits (CiCTRL1<7:5>) = 001, that indi-
cates whether the module successfully went into Module
Disable mode. The I/O pins will revert to normal I/O
function when the module is in the Module Disable mode.
The module can be programmed to apply a low-pass
filter function to the CiRX input line while the module or
the CPU is in Sleep mode. The WAKFIL bit
(CiCFG2<14>) enables or disables the filter.
2009 Microchip Technology Inc.
Modes of Operation
INITIALIZATION MODE
DISABLE MODE
dsPIC33FJXXXMCX06A/X08A/X10A
Preliminary
21.3.3
Normal
REQOP<2:0> = 000. In this mode, the module is
activated and the I/O pins will assume the CAN bus
functions. The module will transmit and receive CAN
bus messages via the CiTX and CiRX pins.
21.3.4
If the Listen Only mode is activated, the module on the
CAN bus is passive. The transmitter buffers revert to
the port I/O function. The receive pins remain inputs.
For the receiver, no error flags or Acknowledge signals
are sent. The error counters are deactivated in this
state. The Listen Only mode can be used for detecting
the baud rate on the CAN bus. To use this, it is neces-
sary that there are at least two further nodes that
communicate with each other.
21.3.5
The module can be set to ignore all errors and receive
any message. The Listen All Messages mode is
activated by setting REQOP<2:0> = 111. In this mode,
the data which is in the message assembly buffer until
the time an error occurred, is copied in the receive
buffer and can be read via the CPU interface.
21.3.6
If the Loopback mode is activated, the module will
connect the internal transmit signal to the internal
receive signal at the module boundary. The transmit
and receive pins revert to their port I/O function.
Note:
Operation
Typically, if the CAN module is allowed to
transmit in a particular mode of operation
and a transmission is requested immedi-
ately after the CAN module has been
placed in that mode of operation, the mod-
ule waits for 11 consecutive recessive bits
on the bus before starting transmission. If
the user switches to Disable mode within
this 11-bit period, then this transmission is
aborted and the corresponding TXABT bit
is set, and the TXREQ bit is cleared.
NORMAL OPERATION MODE
LISTEN ONLY MODE
LISTEN ALL MESSAGES MODE
LOOPBACK MODE
mode
is
DS70594B-page 219
selected
when
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