HD6417760BL200AV Renesas Electronics America, HD6417760BL200AV Datasheet - Page 930
HD6417760BL200AV
Manufacturer Part Number
HD6417760BL200AV
Description
SH4 7760, 17 X17 256BGA, LCDC, U
Manufacturer
Renesas Electronics America
Series
SuperH® SH7750r
Datasheet
1.D6417760BP200ADV.pdf
(1418 pages)
Specifications of HD6417760BL200AV
Core Processor
SH-4
Core Size
32-Bit
Speed
200MHz
Connectivity
Audio Codec, CAN, EBI/EMI, FIFO, I²C, MFI, MMC, SCI, Serial Sound, SIM, SPI, USB
Peripherals
DMA, LCD, POR, WDT
Number Of I /o
69
Program Memory Type
ROMless
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
1.4 V ~ 1.6 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
256-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
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When the HCAN2 recognizes the end of Arbitration field while receiving a message, it starts
comparing the received identifier to the identifiers set in Mailboxes, starting from Mailbox 31
down to Mailbox 0. It first checks the MBC if it is configured as a receive box, and reads LAFM,
and reads the CAN-ID of Mailbox 31 (if configured as receive) to finally compares them to the
received ID. If it does not match, the same check takes place at Mailbox 30 (if configured as a
receive). Once HCAN2 finds a matching identifier, it stores the number of Mailbox [N] into an
internal buffer, stops the search, and gets back to idle state, waiting for an EndOfFrame (EOF) to
come. When an EOF is notified by the CAN interface logic, HCAN2 this time only reads the
MBC, LAFM and CAN-ID of Mailbox [N] to confirm the matching condition again (i.e., there has
been no modification to the configuration of Mailbox [N]). This re-confirmation guarantees the
data consistency even when a Mailbox is re-configured during receiving message. If it still
matches, then the message is written or abandoned, depending on the NMC bit. If it is written into
the corresponding Mailbox, including the CAN-ID, i.e., there is a possibility that the CAN-ID is
overwritten by a different CAN-ID of the received message due to the LAFM used. This also
implies that, if the identifier of the received message matches the ID + LAFM of 2 or more
Mailboxes, the higher numbered Mailbox will always store the relevant messages and the lower
numbered Mailbox will never receive messages. Therefore, the settings of the identifiers and
LAFMs need to be carefully selected.
22.6.5
When re-configuration of Mailboxes is required, the following procedures should be taken.
(1) Change ID of transmit box or Change transmit box to receive box
Confirm that the corresponding CANTXPR is not set. The identifier and corresponding MBC field
can be changed at any time. When both of them need to be changed, please change the identifier
first and then the corresponding MBC field.
(2) Change ID of receive box or Change receive box to transmit box
• Method-1: Using Halt Mode
• Method-2: Without Using Halt Mode
Rev. 2.00 Feb. 12, 2010 Page 846 of 1330
REJ09B0554-0200
The advantage of this method is that HCAN2 will not lose a message if the message is
currently on the CAN bus and the HCAN2 is a receiver. HCAN2 will be in Halt Mode after
completing of the reception. The disadvantage is that it might take long if HCAN2 is receiving
a message (as the transmission to the halt state is delayed until the end of the reception), and
also HCAN2 will not be able to receive/transmit messages during Halt mode.
The advantage of this method is that the re-configuration is done instantly, and the software
overhead can be substantially reduced because of no interruption. CANRXPR (CANRFPR)
needs to be read before and after the re-configuration is to check if a message is received or not
during this period. Please note that CANMBIMR does not prevent the CANRXPR
Reconfiguration of Mailbox
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