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Spectrum Digital, Inc

2-12

TMS320C54XX Evaluation Module Technical Reference

2.2.3 I/O Space

The I/O map for the TMS320C54XX EVM is shown below:

2.3 Onboard UART

The TMS320C54XX EVM has a TL16C550 UART mapped into the I/O space of the

C54XX at locations 0x0000 - 0x0008. The UART allows users to use this resource for

data logging, code debugging or other application features. Appendix C contains the

programming information for the TL16C550 device.

2.4 Oscillator Selection

The TMS320C54XX EVM is equipped with a 10 Megahertz oscillator. When the

processor resets the PLL Clock Module defaults to 10 Mhz CLKOUT in divide mode.

The PLL can then be programmed to obtain a variety of clock frequencies. If the PLL

frequency is required to change after the programming the part must be returned to the

divide mode before the programming of the new PLL frequency. The user should refer

to the “PLL Clock Module” section in the TMS320C54XX User’s guide for valid clock

configurations.

Hex

0x0000

0x0FFF

0x1000

0x7FFF

0x8000

0xFFFF

Off-Chip UART

Expansion

FLASH ROM if OUT3 = 0

Expansion if OUT3 = 1

Figure 2-5, EVM320C54XX I/O Space

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 44 45

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