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Chapter 1 MC9S12XF-Family Reference Manual
MC9S12XF - Family Reference Manual, Rev.1.19
64
Freescale Semiconductor
1.2.9.5
VDDA, VSSA — Power Supply Pins for ATD and VREG
VDDA, VSSA are the power supply and ground input pins for the voltage regulator and the analog to
digital converters.
1.2.9.6
VRH, VRL — ATD Reference Voltage Input Pins
VRH and VRL are the reference voltage input pins for the analog to digital converter.
1.2.9.7
VDDPLL, VSSPLL — Power Supply Pins for PLL
These pins provide operating voltage and ground for the oscillator and the phased-locked loop. The voltage
supply of nominally 1.8V is derived from the internal voltage regulator when enabled. This allows the
supply voltage to the oscillator and PLL to be bypassed independently. This voltage is generated by the
internal voltage regulator. No static external loading of these pins is permitted.
NOTE
Connecting additional load to this pin is not permitted when the internal
regulator is enabled.
Table 1-11.
MC9S12XF512 Power and Ground Connection Summary
Mnemonic
Pin Number
Nominal
Voltage
Description
144-pin
LQFP(1)
112-pin LQFP
64-pin LQFP
VDDF
14
7
2.8 V
Internal power and ground
generated by internal regulator for
the internal NVM.
VDD
89
65
37
1.8 V
Internal power and ground
generated by internal regulator for
the internal core.
VSS1, 2, 3
15, 90, 52
15, 66, 42
8, 38, 22
0V
VDDR
53
43
23
5.0 V
External power supply internal
voltage regulator
VDDX1
134
104
60
5.0 V
External power and ground, supply
to pin drivers
VSSX1
133
103
59
0 V
VDDX2
50
40
20
5.0 V
External power and ground, supply
to pin drivers
VSSX2
52
41
21
0 V
VDDX3
17
—
5.0 V
External power and ground, supply
to pin drivers
VSSX3
16
—
0 V
VDDX4
69
—
5.0 V
External power and ground, supply
to pin drivers
VSSX4
70
—
0 V
VDDA
107
83
47
5.0 V
Operating voltage and ground for
the analog-to-digital converters
and the reference for the internal
voltage regulator, allows the supply
voltage to the A/D to be bypassed
independently.
VSSA
110
86
50
0 V