Message Control (Mc0 To Mc15); Figure 15.2 Message Control Register Configuration; Figure 15.3 Standard Format; Figure 15.4 Extended Format - Hitachi H8S/2628 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]
Mail box 15 MC15[1]

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
Rev. 1.0, 09/02, page 380 of 568
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

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
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 R1