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Chapter 1 Device Overview (MC9S12XDP512V2)
MC9S12XDP512 Data Sheet, Rev. 2.11
88 Freescale Semiconductor
1.2.3.59 PS4 / MISO0 — Port S I/O Pin 4
PS4 is a general-purpose input or output pin. It can be configured as master input (during master mode) or
slave output pin (during slave mode) MOSI of the serial peripheral interface 0 (SPI0).
1.2.3.60 PS3 / TXD1 — Port S I/O Pin 3
PS3 is a general-purpose input or output pin. It can be configured as the transmit pin TXD of serial
communication interface 1 (SCI1).
1.2.3.61 PS2 / RXD1 — Port S I/O Pin 2
PS2 is a general-purpose input or output pin. It can be configured as the receive pin RXD of serial
communication interface 1 (SCI1).
1.2.3.62 PS1 / TXD0 — Port S I/O Pin 1
PS1 is a general-purpose input or output pin. It can be configured as the transmit pin TXD of serial
communication interface 0 (SCI0).
1.2.3.63 PS0 / RXD0 — Port S I/O Pin 0
PS0 is a general-purpose input or output pin. It can be configured as the receive pin RXD of serial
communication interface 0 (SCI0).
1.2.3.64 PT[7:0] / IOC[7:0] — Port T I/O Pins [7:0]
PT[7:0] are general-purpose input or output pins. They can be configured as input capture or output
compare pins IOC[7:0] of the enhanced capture timer (ECT).
1.2.4 Power Supply Pins
MC9S12XDP512 power and ground pins are described below.
NOTE
All V
SS
pins must be connected together in the application.
1.2.4.1 V
DDX1
, V
DDX2
, V
SSX1
,V
SSX2
— Power and Ground Pins for I/O Drivers
External power and ground for I/O drivers. Because fast signal transitions place high, short-duration
current demands on the power supply, use bypass capacitors with high-frequency characteristics and place
them as close to the MCU as possible. Bypass requirements depend on how heavily the MCU pins are
loaded.