mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 55

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

1.2.3
1.2.3.1
EXTAL and XTAL are the crystal driver and external clock pins. On reset all the device clocks are derived
from the EXTAL input frequency. XTAL is the crystal output.
1.2.3.2
The RESET pin is an active low bidirectional control signal. It acts as an input to initialize the MCU to a
known start-up state, and an output when an internal MCU function causes a reset.The RESET pin has an
internal pullup device.
Freescale Semiconductor
Function 1
PT[7:0]
Name
PS5
PS4
PS3
PS2
PS1
PS0
Pin
Function 2
Detailed Signal Descriptions
IOC[7:0]
MOSI0
MISO0
Name
RXD1
RXD0
EXTAL, XTAL — Oscillator Pins
RESET — External Reset Pin
TXD1
TXD0
Pin
For devices assembled in 80-pin and 112-pin packages all non-bonded out
pins should be configured as outputs after reset in order to avoid current
drawn from floating inputs. Refer to
This section describes all pins which are availabe on the cover part
MC9S12XDP512 in 144-pin LQFP package. For modules and pinout
explanations of the different family members refer to
explanations:
Sets S12XA & S12XB - Family
Function 3
Name
Pin
—
—
—
—
—
—
—
Table 1-7. Signal Properties Summary (Sheet 4 of 4)
and
Function 4
E.5 Peripheral Sets S12XD - Family
Name
MC9S12XDP512 Data Sheet, Rev. 2.17
Pin
—
—
—
—
—
—
—
Function 5
Name
Pin
—
—
—
—
—
—
—
NOTE
NOTE
Table 1-7
Supply
Power
V
V
V
V
V
V
V
DDX
DDX
DDX
DDX
DDX
DDX
DDX
for affected pins.
PERS/
PERS/
PERS/
PERS/
PERS/
PERS/
PERT/
CTRL
PPSS
PPSS
PPSS
PPSS
PPSS
PPSS
PPST
Internal Pull
Resistor
Chapter 1 Device Overview MC9S12XD-Family
E.7 Pinout
and
Disabled Port T I/O, timer channels
Reset
State
E.6 Peripheral
Up
Up
Up
Up
Up
Up
Port S I/O, MOSI of SPI0
Port S I/O, MISO of SPI0
Port S I/O, TXD of SCI1
Port S I/O, RXD of SCI1
Port S I/O, TXD of SCI0
Port S I/O, RXD of SCI0
Description
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