Chapter 1 Device Overview MC9S12ZVHY/MC9S12ZVHL Families
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
39
NOTE
To avoid current drawn from floating inputs, all non-bonded pins should be
configured as output or configured as input with a pull up or pull down
device enabled
1.7.2
Detailed Signal Descriptions
1.7.2.1
RESET — External Reset Signal
The RESET signal 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 pull-up device.
1.7.2.2
TEST — Test Pin
This input only pin is reserved for factory test. This pin has an internal pull-down device.
NOTE
The TEST pin must be tied to ground in all applications.
1.7.2.3
MODC — Mode C Signal
The MODC signal is used as a MCU operating mode select during reset. The state of this signal is latched
to the MODC bit at the rising edge of RESET. The signal has an internal pull-up device.
1.7.2.4
PAD[7:0] / KWAD[7:0] — Port AD, Input Pins of ADC
PAD[7:0] are general-purpose input or output signals. The signals can be configured on per signal basis as
interrupt inputs with wake-up capability (KWAD[7:0]). These signals can have a pull-up or pull-down
device selected and enabled on per signal basis. Out of reset the pull devices are disabled.
Port S
PS[7:0]
PS[7:0]
PS[7:0]
Port T
PT[7:0]
PT[7:6], PT[4:0]
PT[7:6], PT[4:0]
Port U
PU[7:0]
PU[7:0]
PU[7:0]
Port J
PJ[3:0]
—
PJ[1:0]
sum of ports
100
73
78
Table 1-6. Port Availability by Package Option
MC9S12ZVHY/
MC9S12ZVHL
MC9S12ZVHY
MC9S12ZVHL
Port
144 LQFP
100 LQFP
100 LQFP
