SH7047F Datasheet, PDF (32/85 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7047 Series

Section 3 Example 3
(Extended Format, 1 Byte of Data)
3.1 Transmission and Reception Specifications
Transmission and reception of 1 byte of data in the extended format using two SH7047F devices.
Common Transmission and Reception Specifications
• The data transfer speed is 250 kbps (during 50 MHz operation).
• The standard identifier is H'555, and the extended identifier is H'2AAAA.
Transmission Specifications
• Mailbox 1 is used.
• The data length is 1 byte, and the data transmitted is H'AA.
• The mailbox empty interrupt (IRR8) is used. After message transmission wait status has been
set, the transmission end flag is cleared and mailbox empty interrupts are prohibited within the
mailbox empty interrupt routine, completing the operation.
Reception Specifications
• Mailbox 0 is used.
• The identifier is masked and reception takes place when a match occurs.
• The message reception interrupt (IRR1) is used. The received data is stored in on-chip RAM,
the reception end flag is cleared, and message reception interrupts are prohibited within the
message reception interrupt routine, completing the operation.
3.2 Transmission and Reception Specifications, Function Description
Table 3.1 lists the functions allocated to registers. (See example 1 for information on pins and
port registers.)
Rev. 1.00, 08/03, page 24 of 74