DTK PAM-0057I User Manual page 18

Chapter 2
3. 3.3V (I/O)/2.2V (core) Dual Voltage CPU: 2.2V AMD-K6 and AMD-K6-2
4. 3.3V (I/O)/2.8V (core) Dual Voltage CPU: P55C, Cyrix 6x86L
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Fig. 4c CPU Type – 3.3V/2.2V
Fig. 4d CPU Type - 3.3V/2.8V