HONEYWELL 05704-A-0121卡件，數(shù)據(jù)庫
SRAM由MC2chip控制，訪問時間為可編程。請參閱MVME172 VME中的MC2chip說明有關(guān)更多詳細(xì)信息，請參閱嵌入式控制器程序員參考指南。關(guān)于電池機載SRAM的電源為EM1275帶有兩個BR1225的設(shè)備（或同等設(shè)備，如RAYOVAC FB1225）-類型鋰電池。電池帶有插座，便于拆卸和安裝替換提供小電容器，以便電池可以快速更換，無數(shù)據(jù)丟失。電池的使用壽命在很大程度上取決于環(huán)境電路板溫度和通電占空比。
HONEYWELL 05704-A-0121卡件鋰MVME172LX上提供的電池應(yīng)至少使用兩年在電路板斷電和環(huán)境溫度下的備份時間溫度為40°C。如果通電占空比為50%，則電路板為電池壽命為四年。在較低在環(huán)境溫度下，備份時間相應(yīng)更長。如果您打算將電路板放入存儲器，通過停止振蕩器將M48T58置于省電模式將延長電池壽命。這是在高環(huán)境溫度下尤其重要。進(jìn)入省電模式模式下，執(zhí)行172Bug PS命令（請參閱中的調(diào)試器命令）第3）章）或其等效的應(yīng)用程序特定命令?；謴?fù)時電路板維修時，執(zhí)行172Bug SET命令（SETmmddyyhhmm）安裝后重新啟動振蕩器并初始化時鐘MVME172LX出廠時電池已斷開（VMEbus+5V備用電壓選擇為一次和二次電壓電源）。如果您打算將電池用作電源，是一次或二次，有必要重新配置J14上的跳線安裝板之前。請參閱SRAM備用電源選擇第1-9頁的標(biāo)題（J14），用于可用跳線配置。電池的電源線暴露在電池的焊接側(cè)板電路板不應(yīng)放置在導(dǎo)電表面或儲存在除非拆下電池，否則使用導(dǎo)電袋。鋰電池包含易燃材料，例如鋰和有機溶劑。如果鋰電池如果受到虐待或處理不當(dāng)，它們可能會爆裂并點燃，可能導(dǎo)致受傷和/或火災(zāi)。交易時對于鋰電池，請仔細(xì)遵守列出的注意事項為了防止事故發(fā)生。
The SRAM is controlled by the MC2chip, and the access time is
programmable. Refer to the MC2chip description in the MVME172 VME
Embedded Controller Programmer’s Reference Guide for more detail.
About the Batteries
The power source for the onboard SRAM is an Electro Marketing EM1275
device (or equivalent, such as RAYOVAC FB1225) with two BR1225-
type lithium cells. The battery is socketed for easy removal and
replacement. Small capacitors are provided so that the batteries can be
quickly replaced without data loss.
The service life of the batteries is very dependent on the ambient
temperature of the board and the power-on duty cycle. The lithium
batteries supplied on the MVME172LX should provide at least two years
of backup time with the board powered off and with an ambient
temperature of 40° C. If the power-on duty cycle is 50% (the board is
powered on half of the time), the battery lifetime is four years. At lower
ambient temperatures, the backup time is correspondingly longer.
If you intend to place the board in storage, putting the M48T58 in powersave mode by stopping the oscillator will prolong battery life. This is
especially important at high ambient temperatures. To enter power-saving
mode, execute the 172Bug PS command (refer to Debugger Commands in
Chapter 3) or its equivalent application-specific command. When restoring
the board to service, execute the 172Bug SET command (set
mmddyyhhmm) after installation to restart the oscillator and initialize the
clock.
The MVME172LX is shipped with the batteries disconnected (i.e., with
VMEbus +5V standby voltage selected as both primary and secondary
power source). If you intend to use the battery as a power source, whether
primary or secondary, it is necessary to reconfigure the jumpers on J14
before installing the board. Refer to SRAM Backup Power Source Select
Header (J14) on page 1-9 for available jumper configurations.
The power leads from the battery are exposed on the solder side of the
board. The board should not be placed on a conductive surface or stored in
a conductive bag unless the battery is removed.Lithium batteries incorporate inflammable materials such as
lithium and organic solvents. If lithium batteries are
mistreated or handled incorrectly, they may burst open and
ignite, possibly resulting in injury and/or fire. When dealing
with lithium batteries, carefully follow the precautions listed
below in order to prevent accidents.
