DF36054GFPJV Renesas Electronics America, DF36054GFPJV Datasheet - Page 362

• Manufacturer Part Number: DF36054GFPJV
• Description: MCU 3/5V 32K J-TEMP PB-FREE 64-L
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300H Tinyr

Specifications of DF36054GFPJV

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SSU
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 45
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 15 Controller Area Network for Tiny (TinyCAN)
Internal Arbitration at Transmission: The TinyCAN transmits untransmitted messages in the
priority order from Mailbox 3 to Mailbox 1. The internal arbitration function selects the Mailbox
with the highest priority among all transmission request messages. Internal arbitration is based on
the three sources given below.
TXPR/TXCR Setting: Figure 15.7 shows the timing of the TinyCAN internal arbitration caused
by the TXPR/TXCR setting. Transmit procedure and operation are as follows.
1. Write data of a transmit message to MCn0, MCn4 to MCn7, and MDn0 to MDn7 [n = 1 to 3]
2. Set the corresponding MBn bit in TXPR to 1 (start condition issuance). Then, the start
3. The internal arbitration for message 1 is determined and the transmit message is transferred to
4. After the seventh bit of the EOF has been transmitted (normal message transmission end), the
5. When there is a transmit request other than for message 1, the transmit message is transferred
Rev. 4.00 Mar. 15, 2006 Page 328 of 556
REJ09B0026-0400
TXPR/TXCR is set
Arbitration lost during message transmission
CAN bus error
before clearing the MBn bit in MBCR corresponding to the Mailbox of the transmit message to
0 (initial setting).
condition is generated.
the temporary buffer. After that, even if a transmit request cancellation is issued to the message
being transmitted by the DART or MBn bit in TXCR, message 1 is transmitted continuously
unless the TinyCAN detects an arbitration loss or error on the CAN bus.
MBn bits in TXPR and TXCR which are corresponding Mailbox are cleared to 0 and the MBn
bit in TXACK and the EMPI bit in TCIRR1 are set to 1. At this time, the MBn bit in ABACK
is always 0. Then, message transmission is completed.
to the temporary buffer and transmitted to the CAN bus after the arbitration for message 2 has
been determined. When there is no transmit request other than for message 1, the TinyCAN
performs reception.