PXN20RM Datasheet, PDF (109/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

3.4.14 Clock Synthesizer Signals
Signal Description
3.4.14.1 Crystal Oscillator Input / External Clock Input
EXTAL
EXTAL is the input pin for an external crystal oscillator or an external clock source.
3.4.14.2 Crystal Oscillator Output
XTAL
XTAL is the output pin for an external crystal oscillator.
3.4.14.3 System Clock Output
CLKOUT
CLKOUT is the device system clock output. This signal is multiplexed with PK9 (user mode) and PK0
(test mode).
3.4.15 Power / Ground Signals
3.4.15.1 Internal Logic Supply Input
V_DD
V_DD is the 1.2 V (nominal) internal logic supply input.
3.4.15.2 Fixed 3.3V Internal Supply Input
V_DD33
V_DD33 is the 3.3V (nominal) internal supply input.
3.4.15.3 Analog Supply
V_DDA
V_DDA is the 3.3 or 5.0 V (nominal) analog supply input pin for the ADC.
3.4.15.4 External I/O Supply Input
V_DDEn
V_DDEn is the 3.3 or 5.0 V (nominal) external I/O supply input. Four separate inputs are provided.
3.4.15.5 Media Local Bus Supply Input
V_DDEMLB
V_DDEMLB is the 2.5 – 3.3 V supply input for the Media Local Bus interface.
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
3-41