UPD70F3786GJ-GAE-AX Renesas Electronics America, UPD70F3786GJ-GAE-AX Datasheet - Page 1116

• Manufacturer Part Number: UPD70F3786GJ-GAE-AX
• Description: MCU 32BIT V850ES/JX3-E 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Er

Specifications of UPD70F3786GJ-GAE-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: CAN, CSI, EBI/EMI, Ethernet, I²C, UART/USART, USB
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 100
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 124K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

21.8 CAN Controller Initialization
21.8.1 Initialization of CAN module
C0GMCS.CCP0 to C0GMCS.CCP3 bits by software. Do not change the setting of the CAN module system clock
after CAN module operation is enabled.
21.8.2 Initialization of message buffer
the message buffers, even for those not used in the application, is necessary before switching the CAN module from
the initialization mode to one of the operation modes.
21.8.3 Redefinition of message buffer
message is being received or transmitted, without affecting other transmission/reception operations.
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Before CAN module operation is enabled, the CAN module system clock needs to be determined by setting the
The CAN module is enabled by setting the C0GMCTRL.GOM bit.
For the procedure of initializing the CAN module, see 21.16 Operation of CAN Controller.
After the CAN module is enabled, the message buffers contain undefined values. A minimum initialization for all
• Clear the C0MCTRLm.RDY, C0MCTRLm.TRQ, and C0MCTRLm.DN bits to 0.
• Clear the C0MCONFm.MA0 bit to 0.
Remark m = 00 to 31
Redefining a message buffer means changing the ID and control information of the message buffer while a
(1) To redefine message buffer in initialization mode
(2) To redefine message buffer during reception
(3) To redefine message buffer during transmission
Place the CAN module in the initialization mode once and then change the ID and control information of the
message buffer in the initialization mode. After changing the ID and control information, set the CAN module
to an operation mode.
Perform redefinition as shown in Figure 21-39.
To rewrite the contents of a transmit message buffer to which a transmission request has been set, perform
transmission abort processing (see 21.10.4 (1)
operation mode with automatic block transmission (ABT), 21.10.4 (2) Transmission abort process
except for ABT transmission in normal operation mode with automatic block transmission (ABT)).
Confirm that transmission has been aborted or completed, and then redefine the message buffer. After
redefining the transmit message buffer, set a transmission request using the procedure described below.
When setting a transmission request to a message buffer that has been redefined without aborting the
transmission in progress, however, the 1-bit wait time is not necessary.
CHAPTER 21 CAN CONTROLLER
User’s Manual U19601EJ2V0UD
Transmission abort process other than in normal