Signal Description
PXN20 Microcontroller Reference Manual, Rev. 1
3-42 Freescale Semiconductor
3.4.15.6 Nexus Interface Supply Input
V
DDENEX
V
DDENEX
is the 3.3 V (nominal) supply input for the Nexus Debug Interface. This supply is used only on
the 256-pin package.
3.4.15.7 Clock Synthesizer Power Input
V
DDSYN
V
DDSYN
is the is the power supply input for the FMPLL.
3.4.15.8 Voltage Regulator Control Voltage
V
RC
V
RC
is the 3.3 V or 5 V (nominal) input power supply.
3.4.15.9 Voltage Regulator Control Output
V
RCCTL
V
RCCTL
is the current control for external NPN transistor.
3.4.15.10 Supply
V
RCSEL
V
RCSEL
is the input power supply range select.
•V
RCSEL
= 0: 3.3 V supplied external (3.3 V mode)
•V
RCSEL
= 1: 3.3 V internal voltage regulator (5 V mode)
3.4.15.11 Analog High Voltage Reference
V
RH
V
RH
is the analog high voltage reference.
3.4.15.12 Analog Low Voltage Reference
V
RL
V
RL
is the analog low voltage reference.
3.4.15.13 Ground
V
SS
V
SS
is the ground reference input.
3.4.15.14 Analog Ground
V
SSA
V
SSA
is the analog ground reference input.
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