Radisys 97-9029-04工控DCS系統

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中文資料：

奇偶校驗功能在上電時(shí)未啟用，必須通過(guò)將RFM CSR的本地中斷啟用（LIER）寄存器中的位13設置為偏移$14來(lái)啟用。

要使用奇偶校驗函數，必須在32位（Lword）或64位（Qword）邊界上進(jìn)行寫(xiě)入。奇偶校驗有效時(shí)，禁止8位（字節）寫(xiě)入和16位（字）寫(xiě)入。此外，由于RAM沒(méi)有在有效的奇偶校驗狀態(tài)下通電，所以要用奇偶校驗讀取的任何位置都必須首先通過(guò)寫(xiě)入一些數據模式來(lái)初始化。否則，讀取將斷言一個(gè)錯誤的奇偶校驗錯誤。

Radisys 97-9029-04具有單個(gè)可編程VME總線(xiàn)中斷輸出。Radisys 97-9029-04上的一個(gè)或多個(gè)事件可能導致中斷。VMEbus中斷的源可以通過(guò)幾個(gè)寄存器單獨啟用和監控。

Radisys 97-9029-04中斷通過(guò)稱(chēng)為本地中斷狀態(tài)寄存器（LISR）和本地中斷啟用寄存器（LIER）的兩個(gè)RFM CSR進(jìn)行選擇和監控。有關(guān)這兩個(gè)寄存器的詳細說(shuō)明，請參閱編程部分。

英文資料：

The parity function is not enabled at power up and must be enabled by setting Bit 13 in the RFM CSR’s Local Interrupt Enable (LIER) register at offset $14.

 To use the parity function, writes must occur on 32-bit (Lword) or 64-bit (Qword) boundaries. While parity is active, 8-bit (byte) writes and 16-bit (word) writes are prohibited. In addition, since the RAM does not power up in a valid parity state, any location that is to be read with parity must first be initialized by a write of some data pattern. Otherwise the read will assert an erroneous parity error.

The Radisys 97-9029-04 has a single programmable VMEbus interrupt output. One or more events on the Radisys 97-9029-04 can cause the interrupt. The sources of the VMEbus interrupt can be individually enabled and monitored through several registers.

The Radisys 97-9029-04 interrupts are selected and monitored through the two RFM CSRs referred to as the Local Interrupt Status Register (LISR) and the Local Interrupt Enable Register (LIER). For a detailed description of the two registers refer to the Programming section. 

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