MC9S12T64 Datasheet, PDF (76/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Pinout and Signal Description
a bit in DDRK makes the corresponding bit in port K an input. The default
reset state of DDRK is all zeroes.
This register is not in the map in peripheral mode or in expanded modes
while the EMK bit in the MODE register is set.
NOTE:
The ports A, B, E, K, P, S, T can be configured in a very flexible way. For
a full and detailed overview refer to Section Port Integration Module
(PIM).
AD PORT
This port is an analog input interface to the analog-to-digital subsystem.
The digital function of the ports must explicitly be enabled on per pin
basis using a control register in the ADC module. When the port data
registers are read, they contain the digital levels appearing on the input
pins at the time of the read. Input pins with signal potentials not meeting
V_IL or V_IH specifications will have an indeterminate value.
Use of any AD port pin except ETRIG for digital input does not preclude
the use of any other port pin for analog input. Note that the digital/analog
multiplexing function is performed in the input pad. The port registers are
connected to the input pads through tristate buffers. These buffers are
only activated when the port is configured as digital pin so that analog
signal potentials on the input pins will not cause the buffers to draw
excess supply current.
Port S for SCI0, SCI1
and SPI
There are two identical SCI ports. Each SCI module uses two external
pins. The RxD0, RxD1 and TxD0, TxD1pins share general purpose port
SCI P[3:0]. TxD0, TxD1 are available for general-purpose I/O when it is
not configured for transmitter operation. RxD0, RxD1 are available for
general-purpose I/O when it is not configured for receiver operation.
The SPI module uses four external pins. SS, SCK, MOSI, and MISO pins
share general purpose port PS[7:4].
Port T for Timer Port The timer module has eight external pins: PT[7:0]_IOC[7:0], for input
capture and output compare functions. Two of the pins are also the pulse
MC9S12T64Revision 1.1.1
Pinout and Signal Description
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