Message Control (Mc0 To Mc15); Figure 15.2 Message Control Register Configuration; Figure 15.3 Standard Format; Figure 15.4 Extended Format - Renesas H8S Series Hardware Manual

15.3.18 Message Control (MC0 to MC15)

The message control register sets consist of eight 8-bit registers for one mailbox. The HCAN has
16 sets of these registers. Because message control registers are in RAM, their initial values after
power-on are undefined. Be sure to initialize them by writing 0 or 1. Figure 15.2 shows the
register names for each mailbox.
Mail box 0 MC0[1]
Mail box 1 MC1[1]
Mail box 2 MC2[1]
Mail box 3 MC3[1]
MC15[1]
Mail box 15

Figure 15.2 Message Control Register Configuration

The setting of message control registers are shown in the following. Figures 15.3 and 15.4 show
the correspondence between the identifiers and register bit names.
SOF ID-28 ID-27
Standard identifier
MC0[2] MC0[3]
MC1[2] MC1[3]
MC2[2] MC2[3]
MC3[2] MC3[3]
MC15[2] MC15[3] MC15[4]
SOF ID-28 ID-27
Identifier

Figure 15.3 Standard Format

ID-18 SRR

Figure 15.4 Extended Format

Section 15 Controller Area Network (HCAN)
MC0[4] MC0[5] MC0[6]
MC1[4] MC1[5] MC1[6]
MC2[4] MC2[5] MC2[6]
MC3[4] MC3[5] MC3[6]
MC15[5] MC15[6]
ID-18 RTR
IDE ID-17 ID-16
Extended identifier
Rev. 6.00 Mar 15, 2006 page 411 of 570
MC0[7] MC0[8]
MC1[7] MC1[8]
MC2[7] MC2[8]
MC3[7] MC3[8]
MC15[7] MC15[8]
IDE R0
ID-0 RTR
REJ09B0211-0600
R1