描述 Description

General Description
The RTL8196C is an integrated System-on-a-Chip (SoC) Application Specific Integrated Circuit (ASIC) that implements a basic L2 5-port Ethernet switch and a high performance CPU. The embedded RISC CPU is an RLX4181, and the clock rate can be up to 400MHz. To improve computational performance, a 16-Kbyte I-Cache, 8-Kbyte D-Cache, 16-K I-MEM, and 8-Kbyte D-MEM are provided. A standard 5-signal P1149.1 compliant EJTAG test interface is supported for CPU testing and software development.

特性 Features

■ SOC
?? ◆ Embedded RISC CPU, RLX4181 with
????? 16K I-Cache, 8K D-Cache, 16K I-MEM,
????? 8K D-MEM
?? ◆ Supports MIPS-1 ISA, MIPS16 ISA
?? ◆ Clock rate up to 400MHz
?? ◆ Provides a standard 5-signal P1149.1
????? EJTAG test port
?? ◆ Supports RLX4181 CPU suspend mode
■ L2 Capabilities
?? ◆ Five Ethernet MAC integrated switch
????? with five 10M/100Mbps physical layers
????? and transceivers for IEEE 802.3
????? 10Base-T and 100Base-TX
?? ◆ Non-blocking wire-speed reception and
????? transmission and non-head-of-line
????? blocking/forwarding
?? ◆ Internal 512Kbit SRAM for packet
????? buffering
?? ◆ Internal 1024 entry 4-way hash L2 look
????? up table
?? ◆ Supports source and destination MAC
????? address filtering
?? ◆ Supports IEEE 802.1x port-based and
????? MAC-based Network Access Control
?? ◆ Complies with
????? IEEE 802.3/802.3u/802.1q/802.1d
?? ◆ Flexible full-duplex 802.3x flow control
????? and optional half-duplex backpressure
????? flow control
?? ◆ MAC learning supports Shared VLAN
????? Learning (SVL) and Independent VLAN
????? Learning (IVL) modes
■ CPU Interface (NIC)
?? ◆ Supports BSD mbuf-like packet structure
????? with adjustable cluster size (128-byte to
????? 2Kbyte) to provide optimum memory
????? utilization
?? ◆ Provides the ‘To-CPU reason’ in the
????? packet header to facilitate packet
????? processing
?? ◆ The NIC DMA supports multiple
????? descriptor-ring architecture for QoS
????? applications (supports 6 RX descriptor
????? rings and 2 TX descriptor rings)
■ Peripheral Interfaces
?? ◆ Supports one PCI Express Host with
????? integrated PHY
?? ◆ Supports one 16550 UART
?? ◆ Supports up to 17 GPIO pins
?? ◆ Supports one-port USB 2.0 host interface
?? ◆ Embedded USB PHY
■ Memory Interfaces
?? ◆ Flash (NOR Type)
????? ■ Supports two Flash banks that can be
???????? configured as 8/16-bit bus, 256k/512k
???????? /1M/2M/4M/8M bytes
????? ■ System supports up to 16Mbyte Flash
???????? memory space
????? ■ Boot up from NOR Flash is supported
?? ◆ Flash (SPI Type)
????? ■ Supports 4 channels for SPI Flash
???????? application
????? ■ Boot up from SPI Flash is supported
????? ■ System supports up to 32Mbyte Flash
???????? memory space
????????
?? ◆ SDRAM
????? ■ Supports two SDRAM banks that can
???????? be configured as 2M/4M/8M/16M/
???????? 32M/64Mbyte
????? ■ 16-bit SDRAM data bus is supported.
???????? System totally supports up to
???????? 128Mbyte SDRAM memory space
■ Supports Green Ethernet
?? ◆ Cable length power saving
?? ◆ Power down power saving
?? ◆ Supports IEEE 802.3az Draft 2.0 Energy
????? Efficient Ethernet (EEE) for
????? 100Base-TX in full duplex operation,
????? and 10Base-T in full/half duplex mode
■ Other Add-on-Value Features
?? ◆ Supports Link down power saving in
????? Ethernet PHY
?? ◆ Supports two hardware timers and one
????? watchdog timer
?? ◆ Per-port configurable auto-crossover
????? function
?? ◆ Single 25MHz crystal or 40MHz clock
????? input
?? ◆ PQFP 128-pin package