h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 433
h8s-2628
Manufacturer Part Number
h8s-2628
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2628.pdf
(641 pages)
- Current page: 433 of 641
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15.3.16 Unread Message Status Register (UMSR)
UMSR is a 16-bit register containing status flags that indicate, for individual mailboxes (buffers),
that a received message has been overwritten by a new receive message before being read. When
overwritten by a new message, data in the unread receive message is lost.
Note:
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit Name
UMSR7
UMSR6
UMSR5
UMSR4
UMSR3
UMSR2
UMSR1
UMSR0
UMSR15
UMSR14
UMSR13
UMSR12
UMSR11
UMSR10
UMSR9
UMSR8
*
Only 1 can be written to clear the flag.
Initial Value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
R/(W) *
The received message has been overwritten by a
new message before being read.
[Setting condition]
[Clearing condition]
Description
When a new message is received before
RXPR is cleared
Writing 1
Section 15 Controller Area Network (HCAN)
Rev. 3.00 Oct 04, 2005 page 393 of 598
REJ09B0155-0300
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