Interphase Tech 4221 manual 15

Options

Options

Interphase Corporation offers the following Condor options:

•Dual Channel Ethernet (AUI)

•Dual Channel Ethernet (10BaseT)

•3 Channel Ethernet (AUI or 10BaseT)

•Quad Ethernet Channel (AUI or 10BaseT)

Physical Description

The Condor physically conforms to the 6U VMEbus board standard. The board requires the VMEbus +5 (+/- 5%) volt supply. The board supports two channels on the main board with the associated channel connectors and up to two channels on daughter card. The cable connectors for the channels on the daughter cards reside on the daughter cards. See Appendix A for a detailed list of the Condor’s physical requirements and specifications.

Functional Description

The Condor as shown in the block diagram (Figure 1-1.) consists primarily of four front-end channels, a VMEbus Master Interface, a Local Bus (LBUS), a VMEbus Short I/O (slave only) Interface, a CPU Core and a CPU/Local bus interface.

Each Ethernet Front End Channel (FEC) consists of an Ethernet controller, the associated Ethernet cable connections, front end circuitry and a small amount of Local Bus interface glue logic. The VMEbus Master Interface consists of a stand-alone VLSI DMA engine and the associated VMEbus high current driver and receiver devices. The Local Bus (LBUS) consists of the memory buffer and the associated handshake logic for the bus. The VMEbus Short I/O interface consists of the handshake and buffer logic for the host system to issue commands to the board. The CPU Core consists of a CPU with the associated memory and glue logic required to allow the CPU to control the functions of the Condor board. Finally, the CPU/Local Bus interface consists of the tri-state buffers and handshake logic required to allow the CPU to access the resources on the LBUS.

		Ethernet			Daughter
					Card
		Channels
					(Optional)
CPU						Buffer
				Local Bus
Core						SRAM
	Short I/O				VMEbus
	Slave
					Master
			VME/VME64

Figure 1-1. 4221 Condor Block Diagram

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