MC9S08GT16A Datasheet, PDF(31/300 Page) Freescale Semiconductor, Inc – Microcontrollers

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

MC9S08GT16A Datasheet, PDF (31/300 Pages) Freescale Semiconductor, Inc – Microcontrollers

◁

Pins and Connections

When an on-chip peripheral system is controlling a pin, data direction control bits still determine what is

read from port data registers even though the peripheral module controls the pin direction by controlling

the enable for the pinâs output buffer. See Chapter 6, âParallel Input/Output,â for details.

Pullup enable bits for each input pin control whether on-chip pullup devices are enabled whenever the pin

is acting as an input even if it is being controlled by an on-chip peripheral module. When the PTA7âPTA4

pins are controlled by the KBI module and are conï¬gured for rising-edge/high-level sensitivity, the pullup

enable control bits enable pulldown devices rather than pullup devices. Similarly, when IRQ is conï¬gured

as the IRQ input and is set to detect rising edges, the pullup enable control bit enables a pulldown device

rather than a pullup device.

2.3.7 Signal Properties Summary

Table 2-2 summarizes I/O pin characteristics. These characteristics are determined by the way the

common pin interfaces are hardwired to internal circuits.

Table 2-2. Signal Properties

Pin

Name

VDD

VSS

VDDAD

VSSAD

VREFH

VREFL

RESET

IRQ

PTA0/KBIP0

PTA1/KBIP1

PTA2/KBIP2

PTA3/KBIP3

PTA4/KBIP4

PTA5/KBIP5

PTA6/KBIP6

PTA7/KBIP7

PTB0/ADP0

PTB1/ADP1

PTB2/ADP2

Dir

High Current

Pin

â

â

â

â

â

â

I/O

Y

Output

Slew 1

â

â

â

â

â

â

N

I

â

â

I/O

N

I/O

N

I/O

N

I/O

N

I/O

N

I/O

N

I/O

N

I/O

N

I/O

N

I/O

N

I/O

N

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

Pull-Up2

Comments

â

â

â

â

â

â

Y

Y

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

SWC

The 48-pin QFN package has two VSS pins

â VSS1 and VSS2.

Pin contains integrated pullup.

IRQPE must be set to enable IRQ function.

IRQ does not have a clamp diode to VDD.

IRQ should not be driven above VDD.

Pullup/pulldown active when IRQ pin

function enabled. Pullup forced on when

IRQ enabled for falling edges; pulldown

forced on when IRQ enabled for rising

edges.

Pullup/pulldown active when KBI pin

function enabled. Pullup forced on when

KBIPx enabled for falling edges; pulldown

forced on when KBIPx enabled for rising

edges.

MC9S08GT16A/GT8A Data Sheet, Rev. 1

Freescale Semiconductor

31

▷