UAD149自動化模塊,ABB使用方法
緩存模式控制（J3）MVME2603/2604上有256KB的二級緩存。L2緩存操作對用戶是透明的，但其直寫模式是可通過舊板上的頭J3配置。在更新的MVME2603/2604上未提供板頭J3。J3上安裝跳線后，緩存直寫在CPU控制下。拆下跳線后，緩存在所有情況下都會發(fā)生直寫。閃存組選擇（J10）MVME2603/2604基板提供1MB 16位閃存記憶力RAM200內存夾層可容納4MB或8MB額外的64位閃存。
UAD149自動化模塊閃存被組織在一個或兩個組中，每個組16位或64位寬。兩個銀行都有車載調試器，PPCBug。要啟用閃存組A（駐留在RAM200夾層上的焊接設備上的4MB或8MB固件），請在標頭J10上放置一根跳線針腳1和2。啟用閃存組B（位于插槽中的1MB固件在基板上），在收割臺J10針腳2和3之間放置跨接導線。串行端口4接收時鐘配置（J16）在同步串行通信中，您可以在上配置串行端口4MVME2603/2604使用RxC信號提供的時鐘信號線在MVME712M兼容版本的基板上，標題J16將端口4配置為驅動或接收RxC。工廠配置將端口4設置為接收RxC。J16在MVME761兼容上保持打開狀態(tài)版本。要完成串行端口4的配置，必須設置以下內容
配置標頭：? J17（串行端口4傳輸時鐘配置）? J20（串口4發(fā)送時鐘接收器緩沖控制）
? MVME712M過渡模塊上的J15或MVME761上的J3轉換模塊（串行端口4時鐘配置）
圖1-9和圖1-10（適用于MVME712M）以及圖1-14和圖1-15（對于MVME761）顯示了整體跳線設置串行端口的MVME2603/2604和轉換模塊上需4 DCE或DTE配置。
有關這些標頭配置的更多詳細信息，請參閱MVME712M過渡模塊準備，第1-14頁，MVME761第1-25頁的過渡模塊準備，或各用戶的過渡模塊手冊（見附錄D，相關文件）。
Cache Mode Control (J3)
256KB of L2 cache memory is available on the MVME2603/2604. L2
cache operation is transparent to users, but its write-through mode is
configurable via header J3 on older boards. On newer MVME2603/2604
boards, header J3 is not provided. With a jumper installed on J3, cache
write-through is under CPU control. With the jumper removed, cache
write-through occurs in all cases.Flash Bank Selection (J10)
The MVME2603/2604 base board has provision for 1MB of 16-bit Flash
memory. The RAM200 memory mezzanine accommodates 4MB or 8MB
of additional 64-bit Flash memory.
The Flash memory is organized in either one or two banks, each bank
either 16- or 64-bits wide. Both banks contain the onboard debugger,
PPCBug.
To enable Flash bank A (4MB or 8MB of firmware resident on solderedin devices on the RAM200 mezzanine), place a jumper across header J10
pins 1 and 2. To enable Flash bank B (1MB of firmware located in sockets
on the base board), place a jumper across header J10 pins 2 and 3.Serial Port 4 Receive Clock Configuration (J16)
In synchronous serial communications, you can configure Serial Port 4 on
the MVME2603/2604 to use the clock signals provided by the RxC signal
line. On MVME712M-compatible versions of the base board, header J16
configures port 4 to either drive or receive RxC. The factory configuration
has port 4 set to receive RxC. J16 remains open on MVME761-compatible
versions.
To complete the configuration of Serial Port 4, you must set the following
configuration headers as well:
? J17 (Serial Port 4 transmit clock configuration)
? J20 (Serial Port 4 transmit clock receiver buffer control)
? J15 on the MVME712M transition module or J3 on the MVME761
transition module (Serial Port 4 clock configuration)
Figure 1-9 and Figure 1-10 (for the MVME712M) and Figure 1-14 and
Figure 1-15 (for the MVME761) diagram the overall jumper settings
required on the MVME2603/2604 and transition module for a Serial Port
4 DCE or DTE configuration.
For additional details on the configuration of those headers, refer to
MVME712M Transition Module Preparation on page 1-14, MVME761
Transition Module Preparation on page 1-25, or to the respective user’s
manuals for the transition modules (listed in Appendix D, Related
Documentation) as necessary.
