Hardware reference guide

7535 Hardware Reference Guide 7
Chapter 2: The Hardware
The Hardware
2.1 The Hardware
Figure 2.1 The 7535
2.1.1 Processor
The 7535 is built around a 400-MHz Intel PXA255 processor. This ARM-core-
based CPU is also known as XScale™, and is the successor to the StrongArm
SA1110. This processor has many integrated peripherals, such as UARTs, PCM-
CIA/CF, and LCD controllers.
2.1.2 Onboard Memory
The 7535 has 32 megabytes of flash memory and 64 megabytes of RAM.
2.1.3 Hardware Architecture
A smaller, low-power microcontroller, the “peripheral controller”, is used to control
and monitor many aspects of the hardware, including controlling system power,
communicating with the smart battery pack, handling communications with the key-
board controller, collecting raw non-decoded scanner input, monitoring tempera-
ture, light, and other sensors.