Rev. 1.0, 09/02, page 380 of 568
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.
MC0[1]
MC1[1]
MC2[1]
MC3[1]
MC15[1]
MC0[2]
MC1[2]
MC2[2]
MC3[2]
MC15[2]
MC0[3]
MC1[3]
MC2[3]
MC3[3]
MC15[3]
MC0[4]
MC1[4]
MC2[4]
MC3[4]
MC15[4]
MC0[5]
MC1[5]
MC2[5]
MC3[5]
MC15[5]
MC0[6]
MC1[6]
MC2[6]
MC3[6]
MC15[6]
MC0[7]
MC1[7]
MC2[7]
MC3[7]
MC15[7]
MC0[8]
MC1[8]
MC2[8]
MC3[8]
MC15[8]
Mail box 0
Mail box 1
Mail box 2
Mail box 3
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
ID-18
RTR
IDE
R0
identifier
Figure 15.3 Standard Format
SOF
ID-28 ID-27
ID-18
SRR
IDE
ID-17 ID-16
ID-0
RTR
R1
Standard identifier
Extended identifier
Figure 15.4 Extended Format
Содержание H8S/2627
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