Mailbox
17.1.5.23 MSGSTATUS_4 Register (offset = D0h) [reset = 0h]
MSGSTATUS_4 is shown in
and described in
.
The message status register has the status of the messages in the mailbox
Figure 17-25. MSGSTATUS_4 Register
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
NBOFMSGMBM
R-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 17-37. MSGSTATUS_4 Register Field Descriptions
Bit
Field
Type
Reset
Description
2-0
NBOFMSGMBM
R
0h
Number of unread messages in Mailbox.
Limited to four messages per mailbox.
3270
Interprocessor Communication
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated