参数资料
型号: ZL50418/GKC
厂商: ZARLINK SEMICONDUCTOR INC
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA553
封装: 37.50 X 37.50 MM, 2.33 MM HEIGHT, MS-034, HSBGA-553
文件页数: 92/155页
文件大小: 1928K
代理商: ZL50418/GKC
ZL50418
Data Sheet
41
Zarlink Semiconductor Inc.
2.6.2
LED Interface Timing Diagram
The signal from the ZL50418 to the LED decoder is shown in Figure 5.
Figure 5 - Timing Diagram of LED Interface
2.7
Internal Memory
Several internal tables are required and are described as follows:
Frame Control Block (FCB) - Each FCB entry contains the control information of the associated frame
stored in the FDB, e.g., frame size, read/write pointer, transmission priority, etc.
Network Management (NM) Database - The NM database contains the information in the statistics counters
and MIB.
MAC address Control Table (MCT) Link Table - The MCT Link Table stores the linked list of MCT entries that
have collisions in the external MAC Table.
Note that the external MAC table is located in the external SRAM Memory.
2.8
Timeout Reset Monitor
The ZL50418 supports a state machine monitoring block which can trigger a reset if any state machine is
determined to be stuck in a non-idle state for more than 5 seconds. This feature is enabled via a bootstrap pin
(TSTOUT11).
3.0
System Configuration (Stand-alone and Stacking)
3.1
Management and Configuration
Two modes are supported in the ZL50418: managed and unmanaged. In managed mode, the ZL50418 uses an 8-
or 16-bit CPU interface very similar to the Industry Standard Architecture (ISA) specification. In unmanaged mode,
the ZL50418 has no CPU but can be configured by EEPROM using an I2C interface at bootup, or via a
synchronous serial interface otherwise.
3.2
Managed Mode
In managed mode, the ZL50418 uses an 8- or 16-bit CPU interface very similar to the ISA bus. The ZL50418 CPU
interface provides for easy and effective management of the switching system. Figure 6 provides an overview of the
CPU interface.
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