ARM.SoC.Architecture

A photograph of the psion series 5mx which uses a

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Unformatted text preview: converter (ADC). Communications devices include an RS232 serial interface for wired connection and an IrDA compliant infrared interface for wireless connection to printers, modems and host PCs (for software loading and backup). An audio codec allows sound to be digitized from a built-in microphone, stored in the memory, and played back later through the small built-in loud-speaker. Hardware expansion is catered for through PCcard slots. ARM7100 silicon A plot of the ARM? 100 silicon layout is shown in Figure 13.15 and its principal characteristics are summarized in Table 13.3 on page 368. It can be seen from Figure 13.15 that the silicon area is dominated by the CPU core which occupies all but the leftmost quarter of the chip core area. The 8 Kbyte cache RAM occupies the lower half of the CPU core area, with the cache tag store above it to the left, the MMU above that, and the ARM? core at the top right. All of the peripherals and the AMBA bus are in the leftmost quarter. Figure 13.15 ARM7100 die plot. 368 Embedded ARM Applications Table 13.3 Process Metal layers Vdd ARM? 100 characteristics. N/A MIPS 30 0.6 um Transistors 2 Die area N/Amm2 Power 18.432 MHz MIPS/W 14 mW 212 3.3V Clock Comparison with ARM7500FE The balance here is different from the ARM7500FE (see Figure 13.11 on page 363). The high-speed colour look-up table required to drive a CRT monitor on the ARM7500FE occupies more area than does the LCD controller on the ARM? 100, and the floating-point hardware on the ARM7500FE also occupies a considerable area. To compensate the ARM7500FE has a half-size cache, but it still occupies a greater area. 13.7 TheSA-1100 The SA-1100 is a high-performance integrated system-on-chip based around a modified version of the SA-110 StrongARM CPU core described in Section 12.3 on page 327. It is intended for use in mobile phone handsets, modems, and other handheld applications that require high performance with minimal power consumption. The organization of the chip is illustrated in Figure 13.16 on page 369. CPU core The CPU core on the SA-1100 uses the...
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This document was uploaded on 10/30/2011 for the course CSE 378 380 at SUNY Buffalo.

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