參數資料
型號: MSM9225BGA-2K
廠商: OKI ELECTRIC INDUSTRY CO LTD
元件分類: 微控制器/微處理器
英文描述: 2 CHANNEL(S), 1M bps, LOCAL AREA NETWORK CONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁數: 42/95頁
文件大?。?/td> 567K
代理商: MSM9225BGA-2K
MSM9225B User’s Manual
Chapter 2 Register Descriptions
2 – 34
Notes on how to set the Group Message function
When setting the Group Message (GM) function in the message box that selects the extended format as a
frame format, specify the message box numbers consecutively, beginning with the message box with the
largest message box number.
Figure 2-32 (a) shows an example of how to set the GM function in two message boxes when 16 message
boxes are used. First, set NMES0 to NMES3 of the message box count setting register (NMES: 1Ehex) to
“1111”. Next procedure is to set the GM function in the message boxes F and E. To do so, set GMR03 to
GMR00 of the GMR0 (group message register) and GMR13 to GMR10 of the GMR1 to “1111” (FH)
(message box number) and “1110” (EH) (message box number), respectively. In this case, it is also
possible to set GMR03 to GMR00 to “E” (message box number) and GMR13 to GMR10 to “F” (message
box number).
Figure 2-32 (b) shows an example of how to set the GM function when 6 message boxes are used.
Message box
number
Message box
0
1
2
3
4
5
6
7
8
9
A
B
C
D
EGM1
← Set the GM function (GMR1)
Specify the number
of message boxes
to be used using
NMES0 to NMES3
of NMES (1 Ehex).
NMES3 to NMES0:
“1111”
FGM0
← Set the GM function (GMR0)
(a) When 16 message boxes are used
Message box
number
Message box
number
Message box
00
11
22
33
4
GM0 or GM1
NMES3 - NMES0:
“0101”
5
GM0 or GM1
5
GM1 or GM0
(b) When 6 message boxes are used
Figure 2-32 Example of how to set the GM function
To set the GM function, specify the
message box numbers consecutively,
beginning with the largest message box
number.
GMR0 (3Ehex)
EGM0: “1”, GMR03 to GMR00: “1111”
GMR1 (3Fhex)
EGM1: “1”, GMR13 to GMR10: “1110”
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