R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 885

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SH7201 Group
19.5.8
This register is a 16-bit read/conditionally write register and it records the mailboxes whose
contents have not been accessed by the CPU prior to a new message being received. If the CPU
has not cleared the corresponding bit in the RXPR or RFPR when a new message for that mailbox
is received, the corresponding UMSR bit is set to '1'. This bit may be cleared by writing a '1' to the
corresponding bit location in the UMSR. Writing a '0' has no effect.
If a mailbox is configured as transmit box, the corresponding UMSR will not be set.
• UMSR0
Bit 15 to 0 — Indicate that an unread received message has been overwritten or overrun condition
has occurred for Mailboxes 15 to 0.
R01UH0026EJ0300 Rev. 3.00
Sep 24, 2010
Bit[15:0]: UMSR0
0
1
Initial value:
R/W:
Bit:
Unread Message Status Register 0 (UMSR0)
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*
15
0
14
0
Description
[Clearing Condition] Writing '1' (initial value)
Unread received message is overwritten by a new message or overrun
condition
[Setting Condition] When a new message is received before RXPR or RFPR
is cleared
13
0
12
0
11
0
10
0
9
0
UMSR0[15:0]
8
0
7
0
Section 19 Controller Area Network (RCAN-ET)
6
0
5
0
4
0
3
0
2
0
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1
0
0
0