Features

PEX 8548 General Features

o 48-lane PCI Express switch

- Integrated SerDes

o Up to nine configurable ports (x1, x2, x4, x8, x16)

o 37.5mm x 37.5mm, 736-ball PBGA package

o Typical Power: 4.9 Watts

PEX 8548 Key Features

o Standard Compliant

- PCI Express Base Specification, r1.1

o High Performance

- Non-blocking switch fabric

- Full line rate on all ports

- Packet Cut-Thru with 110ns max packet latency (x16 to x16)

o Flexible Configuration

- Nine highly flexible & configurable ports (x1, x2, x4, x8, or x16)

- Configurable with strapping pins, EEPROM, I2C, or Host software

- Lane and polarity reversal

o PCI Express Power Management

- Link power management states: L0, L0s, L1, L2/L3 Ready, and L3

- Device states: D0 and D3hot

o Quality of Service (QoS)

- One Virtual Channel per port

- Eight Traffic Classes per port

- Weighted Round-Robin Ingress Port Arbitration

o Reliability, Availability, Serviceability

- 3 Standard Hot-Plug Controllers

- Upstream port as hot-plug client

- Transaction Layer end-to-end CRC

- Poison bit

- INTA# interrupt signal

- Fatal Error (FATAL_ERR#) signal (legacy SERR equivalent)

- PCIe baseline error reporting

- Advanced Error Reporting

- Port Status bits and GPO available

- Per port error diagnostics

• Bad DLLPs

• Bad TLPs

• CRC errors

- JTAG boundary scan