The Bush Set Top Box Hardware - CPU

ARM 7500FE

The CPU of the system is a Cirrus Logic PS7500FE System on a Chip(SOC). This is really more than just a CPU as it contains the memory management unit, the IO controller for several functions, the video display driver, the sound macrocell (unused on a bush box) and the FPU. These functions are effectively the agrigation of four previous arm chips into a single package (ARM's ARM710, IOMD, VIDC, FPA11).

The CPU is clocked at 48MHz (see the crystals in the SW of the board). This can be changed to 64Mhz.

The ARM datasheet (local copy) or the Cirrus datasheet (local copy) for this device shows all these features in more detail.


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