HONEYWELL 05704-A-014工控備件
要從模塊中卸下電池，請(qǐng)小心地從插座安裝新電池之前，請(qǐng)確保電池針腳清潔。筆記檢查電池極性，然后將電池壓入插座。當(dāng)電池在插座中，無需焊接。EPROM和閃存MVME172LX可訂購2MB閃存和兩個(gè)EPROM插槽準(zhǔn)備好安裝EPROM閃存是單個(gè)Intel 28F016SA設(shè)備以2Mb x 8配置組織。EPROM位置是標(biāo)準(zhǔn)的JEDEC 32針DIP插座，可容納三個(gè)可選跳線密度（256 Kb x 8；512 Kb x 8；1 Mb x8）。
HONEYWELL 05704-A-014工控備件跳線設(shè)置（GPI4，引腳J21上的9-10），允許從閃存中提取重置代碼（已安裝GPI4）或來自EPROM（已卸下GPI4）。電池備份RAM和時(shí)鐘MVME172LX上使用了M48T58 RAM和時(shí)鐘芯片。這個(gè)芯片提供時(shí)鐘、振蕩器、晶體、電源故障檢測(cè)、，內(nèi)存寫保護(hù)、8KB RAM和一個(gè)28針電池包裹時(shí)鐘提供秒、分、時(shí)、日、日、月、，以及BCD 24小時(shí)格式的年份。28、29（閏年）和自動(dòng)生成30天月。系統(tǒng)不會(huì)產(chǎn)生中斷時(shí)鐘雖然M48T58是一個(gè)8位設(shè)備，但MC2chip支持對(duì)M48T58的8位、16位和32位訪問。參考至MVME172 VME嵌入式控制器中的MC2chip有關(guān)詳細(xì)信息，請(qǐng)參閱《程序員參考指南》和M48T58數(shù)據(jù)表編程和電池壽命信息。VMEbus接口和VMEchip2VMEchip2 ASIC提供本地總線到VMEbus接口VMEbus到本地總線接口，以及本地VMEbus。VMEchip2還提供VMEbus系統(tǒng)控制器功能。請(qǐng)參閱MVME172中的VMEchip2說明VME嵌入式控制器程序員參考指南編程信息。注意，未使用VMEchip2中的中止開關(guān)邏輯。GPIVMEchip2的輸入位于$FFF40088位7-0，不包括習(xí)慣于中止開關(guān)中斷集成在MC2chip ASIC中位置$FFF42043。GPI輸入集成到MC2chip中位于位置$FFF4202C位23-16的ASIC。輸入/輸出接口MVME172LX為許多系統(tǒng)應(yīng)用提供板載輸入/輸出。輸入/輸出功能包括串行端口和可選的IP接口模塊、LAN以太網(wǎng)收發(fā)器和SCSI大容量存儲(chǔ)設(shè)備
To remove the battery from the module, carefully pull the battery from the
socket.
Before installing a new battery, ensure that the battery pins are clean. Note
the battery polarity and press the battery into the socket. When the battery
is in the socket, no soldering is required.
EPROM and Flash Memory
The MVME172LX may be ordered with 2MB of Flash memory and two
EPROM sockets ready for the installation of the EPROMs, which may be
ordered separately. Flash memory is a single Intel 28F016SA device
organized in a 2Mb x 8 configuration. The EPROM locations are standard
JEDEC 32-pin DIP sockets that accommodate three jumper-selectable
densities (256 Kb x 8; 512 Kb x 8; 1 Mb x8). A jumper setting (GPI4, pins
9-10 on J21), allows reset code to be fetched either from Flash memory
(GPI4 installed) or from EPROMs (GPI4 removed).Battery Backed Up RAM and Clock
An M48T58 RAM and clock chip is used on the MVME172LX. This chip
provides a time-of-day clock, oscillator, crystal, power fail detection,
memory write protection, 8KB of RAM, and a battery in one 28-pin
package. The clock provides seconds, minutes, hours, day, date, month,
and year in BCD 24-hour format. Corrections for 28-, 29- (leap year), and
30-day months are automatically made. No interrupts are generated by the
clock. Although the M48T58 is an 8-bit device, the interface provided by
the MC2chip supports 8-, 16-, and 32-bit accesses to the M48T58. Refer
to the MC2chip in the MVME172 VME Embedded Controller
Programmer’s Reference Guide and to the M48T58 data sheet for detailed
programming and battery life information.
VMEbus Interface and VMEchip2
The VMEchip2 ASIC provides the local-bus-to-VMEbus interface, the
VMEbus-to-local-bus interface, and the DMA controller functions of the
local VMEbus. The VMEchip2 also provides the VMEbus system
controller functions. Refer to the VMEchip2 description in the MVME172
VME Embedded Controller Programmer’s Reference Guide for detailed
programming information. Note that the Abort switch logic in the VMEchip2 is not used. The GPI
inputs to the VMEchip2 which are located at $FFF40088 bits 7-0 are not
used. The Abort switch interrupt is integrated into the MC2chip ASIC at
location $FFF42043. The GPI inputs are integrated into the MC2chip
ASIC at location $FFF4202C bits 23-16.
I/O Interfaces
The MVME172LX provides onboard I/O for many system applications.
The I/O functions include serial ports and optional interfaces for IP
modules, LAN Ethernet transceivers, and SCSI mass storage devices
