Motorola MC9S12C-Family, MC9S12GC-Family warranty Power Supply Pins

Device User Guide — 9S12C128DGV1/D V01.05

2.3.27 PS[3:2] — Port S I/O Pins [3:2]

PS3 and PS2 are general purpose input or output pins. These pins are not available in the 48 / 52 pin package versions.

2.3.28 PS1 / TXD — Port S I/O Pin 1

PS1 is a general purpose input or output pin and the transmit pin, TXD, of Serial Communication Interface (SCI).

2.3.29 PS0 / RXD — Port S I/O Pin 0

PS0 is a general purpose input or output pin and the receive pin, RXD, of Serial Communication Interface (SCI).

2.3.30 PPT[7:5] / IOC[7:5] — Port T I/O Pins [7:5]

PT7-PT5 are general purpose input or output pins. They can also be configured as the timer system input capture or output compare pins IOC7-IOC5.

2.3.31 PT[4:0] / IOC[4:0] / PW[4:0]— Port T I/O Pins [4:0]

PT4-PT0 are general purpose input or output pins. They can also be configured as the timer system input capture or output compare pins IOC4-IOC0 or as the PWM outputs PW[4:0].

2.4 Power Supply Pins

2.4.1 VDDX,VSSX — Power & Ground Pins for I/O Drivers

External power and ground for I/O drivers. Bypass requirements depend on how heavily the MCU pins are loaded.

2.4.2VDDR, VSSR — Power & Ground Pins for I/O Drivers & for Internal Voltage Regulator

External power and ground for the internal voltage regulator. Connecting VDDR to ground disables the internal voltage regulator.

2.4.3 VDD1, VDD2, VSS1, VSS2 — Internal Logic Power Pins

Power is supplied to the MCU through VDD and VSS. This 2.5V supply is derived from the internal voltage regulator. There is no static load on those pins allowed. The internal voltage regulator is turned off, if VDDR is tied to ground.

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