Message Control (Mc0 To Mc15); Figure 13.2 Message Control Register Configuration; Figure 13.3 Standard Format; Figure 13.4 Extended Format - Renesas H8SX/1520 Series Hardware Manual

Section 13 Controller Area Network (HCAN)

13.3.18 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 13.2 shows the
register names for each mailbox.
Mail box 0
Mail box 1
Mail box 2
Mail box 3
Mail box 15
The setting of message control registers are shown below. Figures 13.3 and 13.4 show the
correspondence between the identifiers and register bit names.
SOF
Rev. 3.00 Mar. 14, 2006 Page 478 of 804
REJ09B0104-0300
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MC0[1] MC0[2]
MC1[1] MC1[2]
MC2[1] MC2[2]
MC3[1] MC3[2]
MC15[1] MC15[2]

Figure 13.2 Message Control Register Configuration

SOF ID-28

Figure 13.3 Standard Format

ID-28 ID-27 ID-18
Standard identifier

Figure 13.4 Extended Format

MC0[3] MC0[4] MC0[5]
MC1[3] MC1[4] MC1[5]
MC2[3] MC2[4] MC2[5]
MC3[3] MC3[4] MC3[5]
MC15[3] MC15[4] MC15[5]
ID-27 ID-18
identifier
SRR IDE ID-17
MC0[6] MC0[7] MC0[8]
MC1[6] MC1[7] MC1[8]
MC2[6] MC2[7] MC2[8]
MC3[6] MC3[7] MC3[8]
MC15[6] MC15[7] MC15[8]
RTR IDE R0
ID-16 ID-0
Extended identifier
RTR R1