HD64F2638F20J Datasheet, PDF (1224/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Appendix B Internal I/O Register
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
REC0—Receive Error Counter
REC1—Receive Error Counter
H'F818
H'FA18
HCAN0
HCAN1^*
Bit
7
6
5
4
3
2
1
0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
Note: * This register is not available in the H8S/2635 Group.
TEC0—Transmit Error Counter
TEC1—Transmit Error Counter
H'F819
H'FA19
HCAN0
HCAN1^*
Bit
7
6
5
4
3
2
1
0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
Note: * This register is not available in the H8S/2635 Group.
UMSR0—Unread Message Status Register
UMSR1—Unread Message Status Register
H'F81A
H'FA1A
HCAN0
HCAN1^*1
Bit
Initial value
Read/Write
15
14
13
12
11
10
9
8
UMSR7 UMSR6 UMSR5 UMSR4 UMSR3 UMSR2 UMSR1 UMSR0
0
0
0
0
0
0
0
0
R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2
Bit
7
6
5
4
3
2
1
0
UMSR15 UMSR14 UMSR13 UMSR12 UMSR11 UMSR10 UMSR9 UMSR8
Initial value
0
0
0
0
0
0
0
0
Read/Write R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2 R/(W)^*2
Unread Message Status Flags
0 [Clearing condition]
• Writing 1
1 Unread receive message is overwritten by a new message
[Setting condition]
• When a new message is received before RXPR is cleared
Notes: 1. This register is not available in the H8S/2635 Group.
2. Only 1 can be written, to clear the flag to 0.
Page 1174 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010