DSPIC30F4013-30I/PT Microchip Technology, DSPIC30F4013-30I/PT Datasheet - Page 137

• Manufacturer Part Number: DSPIC30F4013-30I/PT
• Description: IC DSPIC MCU/DSP 48K 44TQFP
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F4013-30I/PT

• Program Memory Type: FLASH
• Package / Case: 44-TQFP, 44-VQFP
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 30 MIPs
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: AC'97, Brown-out Detect/Reset, I²S, POR, PWM, WDT
• Number Of I /o: 30
• Program Memory Size: 48KB (16K x 24)
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 13x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Data Bus Width: 16 bit
• Processor Series: DSPIC30F
• Core: dsPIC
• Maximum Clock Frequency: 40 MHz
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Data Rom Size: 1024 B
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE4000, DM240002, DM300018, DM330011
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC30F006 - MODULE SKT FOR DSPIC30F 44TQFPAC164305 - MODULE SKT FOR PM3 44TQFPDV164005 - KIT ICD2 SIMPLE SUIT W/USB CABLE
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: DSPIC30F401330IPT

19.4.6
Receive interrupts can be divided into 3 major groups,
each including various conditions that generate
interrupts:
• Receive Interrupt
A message has been successfully received and loaded
into one of the receive buffers. This interrupt is acti-
vated immediately after receiving the End-of-Frame
(EOF) field. Reading the RXnIF flag will indicate which
receive buffer caused the interrupt.
• Wake-up interrupt
The CAN module has woken up from Disable Mode or
the device has woken up from Sleep mode.
• Receive Error Interrupts
A receive error interrupt will be indicated by the ERRIF
bit. This bit shows that an error condition occurred. The
source of the error can be determined by checking the
bits in the CAN Interrupt Status Register CiINTF.
• Invalid message received
• If any type of error occurred during reception of
• Receiver overrun
• The RXnOVR bit indicates that an overrun
• Receiver warning
• The RXWAR bit indicates that the Receive Error
• Receiver error passive
• The RXEP bit indicates that the Receive Error
19.5
19.5.1
The CAN module has three transmit buffers. Each of
the three buffers occupies 14 bytes of data. Eight of the
bytes are the maximum 8 bytes of the transmitted mes-
sage. Five bytes hold the standard and extended iden-
tifiers and other message arbitration information.
19.5.2
Transmit priority is a prioritization within each node of the
pending transmittable messages. There are 4 levels of
transmit priority. If TXPRI<1:0> (CiTXnCON<1:0>, where
n = 0, 1 or 2 represents a particular transmit buffer) for a
particular message buffer is set to ‘11’, that buffer has the
highest priority. If TXPRI<1:0> for a particular message
buffer is set to ‘10’ or ‘01’, that buffer has an intermediate
priority. If TXPRI<1:0> for a particular message buffer is
‘00’, that buffer has the lowest priority.
 2004 Microchip Technology Inc.
the last message, an error will be indicated by the
IVRIF bit.
condition occurred.
Counter (RERRCNT<7:0>) has reached the
Warning limit of 96.
Counter has exceeded the Error Passive limit of
127 and the module has gone into Error Passive
state.
Message Transmission
RECEIVE INTERRUPTS
TRANSMIT BUFFERS
TRANSMIT MESSAGE PRIORITY
Preliminary
19.5.3
To initiate transmission of the message, the TXREQ bit
(CiTXnCON<3>) must be set. The CAN bus module
resolves any timing conflicts between setting of the
TXREQ bit and the Start of Frame (SOF), ensuring that
if the priority was changed, it is resolved correctly
before the SOF occurs. When TXREQ is set, the
TXABT (CiTXnCON<6>), TXLARB (CiTXnCON<5>)
and TXERR (CiTXnCON<4>) flag bits are automati-
cally cleared.
Setting TXREQ bit simply flags a message buffer as
enqueued for transmission. When the module detects
an available bus, it begins transmitting the message
which has been determined to have the highest priority.
If the transmission completes successfully on the first
attempt, the TXREQ bit is cleared automatically and an
interrupt is generated if TXIE was set.
If the message transmission fails, one of the error con-
dition flags will be set and the TXREQ bit will remain set
indicating that the message is still pending for transmis-
sion. If the message encountered an error condition
during the transmission attempt, the TXERR bit will be
set and the error condition may cause an interrupt. If
the message loses arbitration during the transmission
attempt, the TXLARB bit is set. No interrupt is gener-
ated to signal the loss of arbitration.
19.5.4
The system can also abort a message by clearing the
TXREQ bit associated with each message buffer. Set-
ting the ABAT bit (CiCTRL<12>) will request an abort of
all pending messages. If the message has not yet
started transmission, or if the message started but is
interrupted by loss of arbitration or an error, the abort
will be processed. The abort is indicated when the
module sets the TXABT bit, and the TXnIF flag is not
automatically set.
19.5.5
The CAN module will detect the following transmission
errors:
• Acknowledge Error
• Form Error
• Bit Error
These transmission errors will not necessarily generate
an interrupt but are indicated by the transmission error
counter. However, each of these errors will cause the
transmission error counter to be incremented by one.
Once the value of the error counter exceeds the value
of 96, the ERRIF (CiINTF<5>) and the TXWAR bit
(CiINTF<10>) are set. Once the value of the error
counter exceeds the value of 96, an interrupt is gener-
ated and the TXWAR bit in the error flag register is set.
TRANSMISSION SEQUENCE
ABORTING MESSAGE
TRANSMISSION
TRANSMISSION ERRORS
dsPIC30F
DS70082G-page 135