HD6417750RF240V Datasheet, PDF (447/606 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 15 Controller Area Network (HCAN)
Register
Name
Bit
Bit Name
R/W Description
MCx[7] 7 to 0 ID-7 to ID-0
R/W Sets ID-7 to ID-0 in the identifier.
MCx[8] 7 to 0 ID-15 to ID-8 R/W Sets ID-15 to ID-8 in the identifier.
Note: x: Mailbox number
15.3.19 Message Data (MD0 to MD15)
The message data register sets consist of eight 8-bit registers for one mailbox. The HCAN has 16
sets of these registers. Because message data registers are in RAM, their initial values after power-
on are undefined. Be sure to initialize them by writing 0 or 1. Figure 15.5 shows the register
names for each mailbox.
Mail box 0
Mail box 1
Mail box 2
Mail box 3
MD0[1]
MD1[1]
MD2[1]
MD3[1]
MD0[2]
MD1[2]
MD2[2]
MD3[2]
MD0[3]
MD1[3]
MD2[3]
MD3[3]
MD0[4]
MD1[4]
MD2[4]
MD3[4]
MD0[5]
MD1[5]
MD2[5]
MD3[5]
MD0[6]
MD1[6]
MD2[6]
MD3[6]
MD0[7]
MD1[7]
MD2[7]
MD3[7]
MD0[8]
MD1[8]
MD2[8]
MD3[8]
Mail box 15 MD15[1] MD15[2] MD15[3] MD15[4] MD15[5] MD15[6] MD15[7] MD15[8]
Figure 15.5 Message Data Configuration
15.3.20 HCAN Monitor Register (HCANMON)
The HCAN monitor register (HCANMON) is an 8-bit read-only register that reflects the states of
the HCAN pins. This register cannot be modified.
Bit Bit Name
7 to —
2
1
TxD
0
RxD
Initial Value R/W
Undefined —
Undefined R
Undefined R
Description
Reserved
Only 0 should be written to these bits.
Transmission pin
The state of the HTxD pin is read.
This bit cannot be modified.
Reception pin
The state of the HRxD pin is read.
This bit cannot be modified.
Rev. 7.00 Sep. 11, 2009 Page 411 of 566
REJ09B0211-0700