Datasheet

Device Overview MC9S12G-Family
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor 55
1.7.1 Pin Assignment Overview
Table 1-6 provides a summary of which ports are available for each package option.
NOTE
To avoid current drawn from floating inputs, the input buffers of all
non-bonded pins are disabled.
1.7.2 Detailed Signal Descriptions
This section describes the signal properties. The relation between signals and package pins is described in
section 1.8 Device Pinouts.
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.
Table 1-6. Port Availability by Package Option
Port 20 TSSOP 32 LQFP
48 LQFP
48 QFN
64 LQFP 100 LQFP KGD (Die)
Port AD/ADC Channels 6 8 12 16 16 16
Port A pins 000088
Port B pins 000088
Port C pins 000088
Port D pins 000088
Port E pins 222222
Port J 004888
Port M 022444
Port P 046888
Port S 468888
Port T 246888
Sum of Ports 14 26 40 54 86 86
I/O Power Pairs VDDX/VSSX 1/1 1/1 1/1 1/1 3/3 3/3