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| 型號(hào)： | MSM9225BGA-2K |
| 廠商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分類(lèi)： | 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(yè)數(shù)： | 8/95頁(yè) |
| 文件大?。?/td> | 567K |
| 代理商： | MSM9225BGA-2K |
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MSM9225B User’s Manual
Chapter 2 Register Descriptions
2 – 3
2.2
Message Memory
The message memory is the memory for setting and storing messages to be transmitted and received. The message
memory consists of 16 message boxes from message box 0 to message box F.
It is possible to transmit only the messages that have been stored in the message boxes, and the transmission is
done starting from the message box with the higher priority for which a transmission request is present.
Reception is possible only of messages having identifiers stored in the message boxes. When a message has been
received normally without generating an error, and if the identifier matches with the identifier stored in a message
box, the data of the message is stored in the corresponding message box in the message memory. Set the highest
message box number to be used in the register NMES (see Section 2.4.3).
Note when reading Message Memory Related Register
When the Message Memory Related Register (MCR, IDR0, IDR1, MSG0-7 in the case of the standard format,
IDR2-4 and TMSG0-7 in the case of the extended format) is polled, the same data are read out from it as long
as the same address is specified consecutively even if the Message Memory Related Register is overwritten
by the completion of message transfer between each polling.
However the MMA bit of Message Control Register (MCR, ×0hex) and Control Registers located at ×Ehex
and ×Fhex addresses are excluded.
When the Message Memory Related Register is polled, insert the dummy read access to the different address
after each reading out.
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