MC9S08LC60 Datasheet, PDF(31/358 Page) Freescale Semiconductor, Inc – Microcontrollers

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MC9S08LC60 Datasheet, PDF (31/358 Pages) Freescale Semiconductor, Inc – Microcontrollers

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2.3.6 LCD Pins

Chapter 2 Pins and Connections

2.3.6.1 LCD Power Pins

The VLCD, VLL1, VLL2, VLL3, Vcap1, and Vcap2 pins are dedicated to providing power to the LCD module.

For detailed information about these pins see the LCD chapter.

2.3.6.2 LCD Frontplane and Backplane Driver Pins

44 pins are dedicated to frontplane and backplane drivers; on the 64-pin package, 36 pins are dedicated.

Immediately after reset, the LCD driver pins are high-impedance. For detailed information about LCD

frontplane and backplane driver pins, see the LCD chapter.

2.3.7 General-Purpose I/O and Peripheral Ports

MC9S08LC60 Series MCUs support up to 24 general-purpose I/O pins which are shared with on-chip

peripheral functions (timers, serial I/O, ADC, keyboard interrupts, etc.). On each MC9S08LC60 Series

device, there is one input-only and two output-only port pins. When a port pin is conï¬gured as a

general-purpose output or a peripheral uses the port pin as an output, software can select one of two drive

strengths and enable or disable slew rate control. When a port pin is conï¬gured as a general-purpose input

or a peripheral uses the port pin as an input, software can enable a pullup device. For information about

controlling these pins as general-purpose I/O pins, see Chapter 6, âParallel Input/Output.â

Immediately after reset, all pins that are not output-only are conï¬gured as high-impedance

general-purpose inputs with internal pullup devices disabled. After reset, the output-only port function is

not enabled but is conï¬gured for low output drive strength with slew rate control enabled. The PTC6 pin

defaults to BKGD/MS on any reset.

NOTE

To avoid extra current drain from ï¬oating input pins, the reset initialization

routine in the application program should either enable on-chip pullup

devices or change the direction of unused pins to outputs so the pins do not

ï¬oat.

MC9S08LC60 Series Advance Information Data Sheet, Rev. 2

Freescale Semiconductor

PRELIMINARY

31

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