MC9S12E256 Datasheet, PDF (65/602 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 1 MC9S12E256 Device Overview (MC9S12E256DGV1)
1.4.19 PAD[15:0] / AN[15:0] / KWAD[15:0] — Port AD I/O Pins [15:0]
PAD[15:0] are the analog inputs for the analog to digital converter (ADC). They can also be configured as
general purpose digital input or output pin. When enabled as digital inputs or outputs, the PAD[15:0] can
also be configured as Keypad Wake-up pins (KWU) and generate interrupts causing the MCU to exit
STOP or WAIT mode. Consult Chapter 3, “Port Integration Module (PIM9E256V1)” and the Chapter 6,
“Analog-to-Digital Converter (ATD10B16CV4)” for information about pin configurations.
1.4.20 PM7 / SCL — Port M I/O Pin 7
PM7 is a general purpose input or output pin. When the IIC module is enabled it becomes the serial clock
line (SCL) for the IIC module (IIC). While in reset and immediately out of reset the PM7 pin is configured
as a high impedance input pin. Consult Chapter 3, “Port Integration Module (PIM9E256V1)” and
Chapter 10, “Inter-Integrated Circuit (IICV2)” for information about pin configurations.
1.4.21 PM6 / SDA — Port M I/O Pin 6
PM6 is a general purpose input or output pin. When the IIC module is enabled it becomes the Serial Data
Line (SDL) for the IIC module (IIC). While in reset and immediately out of reset the PM6 pin is configured
as a high impedance input pin. Consult Chapter 3, “Port Integration Module (PIM9E256V1)” and
Chapter 10, “Inter-Integrated Circuit (IICV2)” for information about pin configurations.
1.4.22 PM5 / TXD2 — Port M I/O Pin 5
PM5 is a general purpose input or output. When the Serial Communications Interface 2 (SCI2) transmitter
is enabled the PM5 pin is configured as the transmit pin TXD2 of SCI2. While in reset and immediately
out of reset the PM5 pin is configured as a high impedance input pin. Consult Chapter 3, “Port Integration
Module (PIM9E256V1)” and Chapter 8, “Serial Communication Interface (SCIV4)” for information
about pin configurations.
1.4.23 PM4 / RXD2 — Port M I/O Pin 4
PM4 is a general purpose input or output. When the Serial Communications Interface 2 (SCI2) receiver is
enabled the PM4 pin is configured as the receive pin RXD2 of SCI2. While in reset and immediately out
of reset the PM4 pin is configured as a high impedance input pin. Consult Chapter 3, “Port Integration
Module (PIM9E256V1)” and Chapter 8, “Serial Communication Interface (SCIV4)” for information
about pin configurations.
1.4.24 PM3 — Port M I/O Pin 3
PM3 is a general purpose input or output pin. While in reset and immediately out of reset the PM3 pin is
configured as a high impedance input pin. Consult Chapter 3, “Port Integration Module (PIM9E256V1)”
for information about pin configurations.
MC9S12E256 Data Sheet, Rev. 1.08
Freescale Semiconductor
65