UPD70F3771GF-GAT-AX Renesas Electronics America, UPD70F3771GF-GAT-AX Datasheet - Page 991

• Manufacturer Part Number: UPD70F3771GF-GAT-AX
• Description: MCU 32BIT V850ES/JX3-H 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Hr

Specifications of UPD70F3771GF-GAT-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 48MHz
• Connectivity: CAN, CSI, EBI/EMI, I²C, UART/USART, USB
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

V850ES/JG3-H, V850ES/JH3-H
have a pending transmission request (message buffers with the TRQ bit set to 1 in advance) is transmitted.
the transmit message buffer with a pending transmission request. If the new transmission request has a higher priority, it
is transmitted, unless transmission of a message with a low priority has already started. To solve this reversal of priorities,
software can request that transmission of a message of low priority be stopped. The highest priority is determined
according to the following rules.
R01UH0042EJ0400 Rev.4.00
Sep 30, 2010
After the transmit message search, the transmit message with the highest priority of the transmit message buffers that
If a new transmission request is set, the transmit message buffer with the new transmission request is compared with
Remarks 1. If the automatic block transmission request bit C0GMABT.ABTTRG bit is set to 1 in the normal operation
1 (high)
2
3
4
5 (low)
Priority
2. Before changing the contents of the transmit message buffer, the RDY flag of this buffer must be cleared.
3. m = 00 to 31
mode with ABT, the TRQ bit is set to 1 only for one message buffer in the ABT message buffer group.
If the ABT mode was triggered by the ABTTRG bit (1), one TRQ bit is set to 1 in the ABT area (buffers 0
to 7). In addition to this TRQ bit, the application can request transmissions (set TRQ bit to 1) for other TX-
message buffers that do not belong to the ABT area. In that case an internal arbitration process (TX-
search) evaluates all of the TX-message buffers with the TRQ bit set to 1 and chooses the message
buffer that contains the highest prioritized identifier for the next transmission. If there are 2 or more
identifiers that have the highest priority (i.e. identical identifiers), the message located at the lowest
message buffer number is transmitted first.
Upon successful transmission of a message frame, the following operations are performed.
Since the RDY flag may be temporarily locked while the internal processing is changed, it is necessary to
check the status of the RDY flag by software after changing the buffer contents.
- The TRQ bit of the corresponding transmit message buffer is automatically cleared to 0.
- The transmission completion status bit CINTS0 of the C0INTS register is set to 1 (if the interrupt
- An interrupt request signal INTC0TRX is output (if the C0IE.CIE0 bit is set to 1 and if the interrupt
Value of first 11 bits of ID
[ID28 to ID18]:
Frame type
ID type
Value of lower 18 bits of ID
[ID17 to ID0]:
Message buffer number
enable bit (IE) of the corresponding transmit message buffer is set to 1).
enable bit (IE) of the corresponding transmit message buffer is set to 1).
Conditions
The message frame with the lowest value represented by the first 11 bits of the ID
is transmitted first. If the value of an 11-bit standard ID is equal to or smaller than
the first 11 bits of a 29-bit extended ID, the 11-bit standard ID has a higher priority
than a message frame with a 29-bit extended ID.
A data frame with an 11-bit standard ID (C0MCONFm.RTR bit is cleared to 0) has
a higher priority than a remote frame with a standard ID and a message frame
with an extended ID.
A message frame with a standard ID (C0MIDHm.IDE bit is cleared to 0) has a
higher priority than a message frame with an extended ID.
If one or more transmission-pending extended ID message frame has equal
values in the first 11 bits of the ID and the same frame type (equal RTR bit
values), the message frame with the lowest value in the lower 18 bits of its
extended ID is transmitted first.
If two or more message buffers request transmission of message frames with the
same ID, the message from the message buffer with the lowest message buffer
number is transmitted first.
Description
CHAPTER 20 CAN CONTROLLER
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