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The SD Card Detect signal is connected to KBI7 on the on-board MCF51JM MCU and, if configured via
EuSD (SW1-DIP4), IRQ_H on the Primary Tower Elevator. This will allow the host controller to monitor
the presence of an SD memory card. To ensure that he SD Card Detect is handled properly, the
MCF51JM must configure the SD Card Detect GPIO/KBI (PTG3 / KBIP7) as an internal pull-up. This is
done by setting the appropriate register values for PTEPE (PTGPE3=1) for GPIO and additionally KBI1ES
(KBEDG7=0) for KBI functionality. Refer to the MCF51JM128 Reference Manual, Section 9, for
additional details. The SD Card Detect signal must be configured as an internal pull-up regardless of
which host MCU is accessing the MicroSD Card slot.
3.4 5-way Navigation Switch
The TWR-LCD features a 5-way Navigation Switch. This switch will allow user interaction with the
TWR-LCD providing a method to indicate Up (North), Down (South), Right (East), Left (West), and
Select (Center). The corresponding directional signals are connected to the on-board MCF51JM MCU.
It is intended that the on-board MCF51JM MCU firmware either respond directly to the Navigation
Switch or relay the signal detection to the Tower MCU module through the I2C interface.
It is possible to connect the 5-way Navigation Switch directly to the Tower Elevator by making a
hardware modification to the TWR-LCD.
The following resister will should to be populated to create a direct connection to the Tower Elevator:
R19, R22, R23, R24, R26, R28, R29, R32, R41, R44
The resisters are intentionally unpopulated in the final design to ensure maximum compatibility with
additional Freescale Tower MCU and Peripheral Modules.
Populating these resisters will enable to following connections:
Navigation Direction
Up (North)
Down (South)
Right (East)
Left (West)
Select (Center)
Tower Elevator Connection
GPIO7 (Pin A11)
GPIO8 (Pin A10)
GPIO5 (Pin B52)
GPIO1 (Pin B21)
GPIO9 (Pin A9)
Refer to the “Optional Nav Switch Connections to Elevator” section within the TWR -LCD schematics for
additional details.
3.5 Mini-B USB Connection
The TWR-LCD features a Mini-B USB connection on the lower right corner of the module. The USB
connector is used to provide power to the TWR-LCD module when operating in stand-alone mode (not
TWR-LCD User’s Manual
Page 8 of 13
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相关PDF资料
TWR-MC-LV3PH
KIT TOWER SYST 3PH MOTR CTRL MOD
TWR-MEM
MEMORY MODULE FOR TWR SYSTEM
TWR-PROTO
TOWER SYSTEM PROTO
TWR-SER2
TOWER SYSTEM INTERFACE BOARD
TWR-SER
TOWER SERIAL I/O HARDWARE
U202-004-R
HUB USB 1.1 4-PORT MINI
U203-004-R
HUB USB 1.1 4-PORT BUS-POWER
U205-004-R
HUB USB 1.1 4-PORT BUS-POWER
相关代理商/技术参数
TWR-LCD
制造商:Freescale Semiconductor 功能描述:TOWER SYSTEM - LCD CONTROLLER
TWR-LCDC-EPSON
功能描述:显示开发工具 EPSON DISPLAY CONTROL MOD
RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V
TWR-LCD-RGB
功能描述:显示开发工具 TWR-LCD-RGB Module RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V
TWR-LS1021A-PC
功能描述:TOWER SYSTEM MOD FOR LS1021A 制造商:nxp usa inc. 系列:QorIQ?? 零件状态:在售 板类型:评估平台 类型:MPU 核心处理器:ARM? Cortex?-A7 操作系统:- 平台:Freescale Tower System 配套使用产品/相关产品:LS1021A 安装类型:固定 内容:板 标准包装:1
TWR-M
功能描述:电缆固定件和配件 Tension Clip Wire Retainer RoHS:否 制造商:Heyco 类型:Cable Grips, Liquid Tight 材料:Nylon 颜色:Black 安装方法:Cable 最大光束直径:11.4 mm 抗拉强度:
TWR-MCF51AG
功能描述:开发板和工具包 - COLDFIRE TOWER CD MCF51AG
RoHS:否 制造商:Freescale Semiconductor 产品:Development Kits 工具用于评估:MCF53017 核心:ColdFire V3 接口类型:Ethernet, UART, USB 工作电源电压:12 V
TWR-MCF51AG-KIT
功能描述:开发板和工具包 - COLDFIRE TOWER CD MCF51AG128 KIT
RoHS:否 制造商:Freescale Semiconductor 产品:Development Kits 工具用于评估:MCF53017 核心:ColdFire V3 接口类型:Ethernet, UART, USB 工作电源电压:12 V
TWR-MCF51CN
功能描述:界面开发工具 COLDFIRE V1 ETHERNET MODULE
RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V