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产品类别：模块卡件
品牌：DCS、PLC
电话：15270269218
联系人：叶经理
质保期：1年
加工定制：不可定制
产地/厂家：美国
动作描述
本节包含对
MVME162嵌入式控制器。
前面板开关和指示灯
MVME162的前面板上有开关和LED。开关
被复位和中止。重置开关重置所有车载设备，以及
如果板是系统控制器，则驱动SYSRESET*。复位开关可以是：
被软件禁用。
当软件启用时，中止开关在用户可编程级别生成中断。它通常用于中止程序执行
返回调试器。
MVME162前面板上有八个指示灯：故障、状态、运行、SCON，
LAN、FUSE（LAN电源）、SCSI和VME。
当BRDFAIL信号线激活时，红色故障LED（DS1的一部分）点亮。
MC68040状态线在MVME162上被解码，以驱动黄色
STAT（状态）LED（DS1的一部分）。在这种情况下，来自
处理器点亮LED。
当本地总线TIP*信号线接通时，绿色运行LED（DS2的一部分）亮起
低的这表明一个本地总线主控器正在执行本地总线循环。
当VMEchip2是VMEbus时，绿色SCON LED（DS2的一部分）亮起
系统控制器。
当LAN芯片为本地总线时，绿色LAN LED（DS3的一部分）亮起
主人
MVME162向以太网收发器接口提供+12Vdc电源
通过保险丝。出现以下情况时，绿色保险丝（LAN电源）LED（DS3的一部分）亮起：
收发器接口可用电源。
当SCSI芯片是本地总线主机时，绿色SCSI LED（DS4的一部分）亮起。
当板使用VMEbus时，绿色VME LED（DS4的一部分）亮起
（VMEchip2断言VMEbus AS*）或当通过
VMEbus（VMEchip2是本地总线主机）。
功能描述
MVME162IG/D2 1-11
1.
数据总线结构
MVME162上的本地数据总线是32位同步总线，基于
在MC68040总线上，支持突发传输和监听。这个
各种本地总线主设备和从设备使用本地总线进行通信。
本地总线由优先级类型仲裁器和本地总线的优先级进行仲裁
总线主控器从高到低依次为：82596CA LAN、53C710 SCSI、VMEbus，
以及MPU。一般来说，任何主设备都可以访问任何从设备；然而，不是
所有组合都通过常识测试。参考MVME162嵌入式
控制器程序员参考指南和每个设备的用户指南
确定其端口大小、数据总线连接和适用的任何限制
当访问设备时。
MC68040或MC68LC040微处理器
MVME162上使用MC68040或MC68LC040处理器
MC68040具有片上指令和数据缓存以及浮点
加工机这两个处理器之间的主要区别在于
MC68040具有浮点协处理器。请参阅M68040微处理器
更多信息，请参阅用户手册。
MC68xx040高速缓存
MVME162本地总线主机（VMEchip2、MC68xx040、53C710 SCSI
控制器和82596CA以太网控制器）具有可编程控制
监听/缓存模式。MVME162本地总线从站支持
MC68xx040：总线监听稍后在本地总线内存映射表中定义
在本章中。
无VMEbus接口选项
MVME162可作为嵌入式控制器运行，无需
VMEbus接口。为了支持此功能，VMEchip2中的某些逻辑具有
在麦希普被复制了。如果
存在VMEchip2。这些功能的启用由以下控制：
软件和MCchip硬件初始化。
有关订购信息，请联系当地的摩托罗拉销售办事处
ctional Description
This section contains a functional description of the major blocks on the
MVME162 Embedded Controller.
Front Panel Switches and Indicators
There are switches and LEDs on the front panel of the MVME162. The switches
are RESET and ABORT. The RESET switch resets all onboard devices and
drives SYSRESET* if the board is system controller. The RESET switch may be
disabled by software.
When enabled by software, the ABORT switch generates an interrupt at a userprogrammable level. It is normally used to abort program execution and
return to the debugger.
There are eight LEDs on the MVME162 front panel: FAIL, STAT, RUN, SCON,
LAN, FUSE (LAN power), SCSI, and VME.
The red FAIL LED (part of DS1) lights when the BRDFAIL signal line is active.
The MC68040 status lines are decoded, on the MVME162, to drive the yellow
STAT (status) LED (part of DS1). In this case, a halt condition from the
processor lights the LED.
The green RUN LED (part of DS2) lights when the local bus TIP* signal line is
low. This indicates one of the local bus masters is executing a local bus cycle.
The green SCON LED (part of DS2) lights when the VMEchip2 is the VMEbus
system controller.
The green LAN LED (part of DS3) lights when the LAN chip is local bus
master.
The MVME162 supplies +12Vdc power to the Ethernet transceiver interface
through a fuse. The green FUSE (LAN power) LED (part of DS3) lights when
power is available to the transceiver interface.
The green SCSI LED (part of DS4) lights when the SCSI chip is local bus master.
The green VME LED (part of DS4) lights when the board is using the VMEbus
(VMEbus AS* is asserted by the VMEchip2) or when the board is accessed by
the VMEbus (VMEchip2 is the local bus master).
Functional Description
MVME162IG/D2 1-11
1
Data Bus Structure
The local data bus on the MVME162 is a 32-bit synchronous bus that is based
on the MC68040 bus, and which supports burst transfers and snooping. The
various local bus master and slave devices use the local bus to communicate.
The local bus is arbitrated by priority type arbiter and the priority of the local
bus masters from highest to lowest is: 82596CA LAN, 53C710 SCSI, VMEbus,
and MPU. Generally speaking, any master can access any slave; however, not
all combinations pass the common sense test. Refer to the MVME162 Embedded
Controller Programmer’s Reference Guide and to the user’s guide for each device
to determine its port size, data bus connection, and any restrictions that apply
when accessing the device.
MC68040 or MC68LC040 MPU
The MC68040 or MC68LC040 processor is used on the MVME162. The
MC68040 has on-chip instruction and data caches and a floating point
processor. The major difference between the two processors is that the
MC68040 has a floating point coprocessor. Refer to the M68040 Microprocessor
User’s Manual for more information.
MC68xx040 Cache
The MVME162 local bus masters (VMEchip2, MC68xx040, 53C710 SCSI
controller, and 82596CA Ethernet controller) have programmable control of
the snoop/caching mode. The MVME162 local bus slaves which support
MC68xx040 bus snooping are defined in the Local Bus Memory Map table later
in this chapter.
No-VMEbus-Interface Option
The MVME162 can be operated as an embedded controller without the
VMEbus interface. To support this feature, certain logic in the VMEchip2 has
been duplicated in the MCchip. This logic is inhibited in the MCchip if the
VMEchip2 is present. The enables for these functions are controlled by
software and MCchip hardware initialization.
Contact your local Motorola sales office for ordering information
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