參數(shù)資料
型號: MC68HC08LT8
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 75/156頁
文件大小: 1030K
代理商: MC68HC08LT8
MC68HC08LT8 Data Sheet, Rev. 1
Freescale Semiconductor
75
Chapter 8
Liquid Crystal Display (LCD) Driver
8.1 Introduction
This section describes the liquid crystal display (LCD) driver module. The LCD driver module can drive a
maximum of 25 frontplanes and 4 backplanes, depending on the LCD duty selected.
8.2 Features
Features of the LCD driver module include the following:
Software programmable driver segment configurations:
24 frontplanes
×
4 backplanes (96 segments)
25 frontplanes
×
3 backplanes (75 segments)
25 frontplanes
×
1 backplane (25 segments)
LCD bias voltages generated by internal resistor ladder
Software programmable contrast control
8.3 Pin Name Conventions and I/O Register Addresses
Three dedicated I/O pins are for the backplanes, BP0–BP2; twenty four frontplanes, FP1–FP24, are
shared with port B, C, D, and E pins. FP0 and BP3 shares the same pin and configured by the DUTY[1:0]
bits in the LCD clock register.
The full names of the LCD output pins are shown in
Table 8-1
. The generic pin names appear in the text
that follows.
Table 8-1. Pin Name Conventions
LCD Generic Pin Name
Full MCU Pin Name
Pin Selected for LCD Function by:
FP0/BP3
FP0/BP3
BP0–BP2
BP0–BP2
FP1–FP2
PTB6/FP1–PTB7/FP2
LCDE in LCDCR
FP3–FP10
PTE0/FP3–PTE7/FP10
PEE in CONFIG2
LCDE in LCDCR
FP11–FP18
PTD0/FP11–PTD7/FP18
PDE in CONFIG2
LCDE in LCDCR
FP19–FP24
PTC0/FP19–PTC5/FP24
PCEL:PCEH in CONFIG2
LCDE in LCDCR
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