Circuit Descriptions
EN 49Q549.2E LA 7.
2009-May-08
Figure 7-10 PNX8543 connectivity and compute subsystem
The Connectivity Subsystem consists of:
• PCI/XIO interface
• USB2.0 interface
• Three 2-wire UARTs
• Four Master/Slave I
2
C interfaces
• Common Interface/Conditional Access Interface.
The Computing Subsystem consists of:
• 32-bit MIPS RISC core
• Enhanced JTAG (EJTAG) block inside the MIPS
• JTAG_MMIO blocks
•TV controller
• Audio/Video DSP (AV_DSP)
• Memory Control Unit (MCU).
7.5.4 Service Notice - FLASH RAM / PNX8543 exchange
The FLASH RAM (item 7P10) and/or PNX8543 (item 7H00)
can only be exchanged by an authorised central workshop with
dedicated programming tools. Due to the presence of (CI+)
keys in the components, unauthorised exchange of these
components will always result in a defective board.
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