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