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Table 5 - Resistive Touch Analog Isolation Settings
SW5-DIP 1
SW5-DIP 2
SW5-DIP 3
SW5-DIP 4
Touch Panel
Isolation (XPLS)
Touch Panel
Isolation (XMNS)
Touch Panel
Isolation (YMNS)
Touch Panel
Isolation (YPLS)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Connects AN4 (TWR-ELEV) to XPLS Touch Panel Signal
Disconnects AN4 from Touch Panel
Connects AN5 (TWR-ELEV) to XMNS Touch Panel Signal
Disconnects AN5 from Touch Panel
Connects AN6 (TWR-ELEV) to YMNS Touch Panel Signal
Disconnects AN6 from Touch Panel
Connects AN7 (TWR-ELEV) to YPLS Touch Panel Signal
Disconnects AN7 from Touch Panel
3.3 MicroSD Card
The Tower System defines a Secure Digital interface as shown in 0. The SD Card interface is
multiplexed over the SPI1 signals and two GPIOs such that the host can communicate with the SD
memory card in the SD Card slot using the SPI mode or the one- or four-bit SD mode.
The MicroSD Card slot is accessible to either the on-board MCF51JM MCU or a compatible Tower MCU
Module. Use SW1 – DIP4 to select which MCU has access to the MicroSD Card slot. Refer to Section 4
for more configuration details.
Table 6 - MicroSD Card Slot MCU Selection
ELE uSD
(SW1-DIP4)
ON
OFF
MicroSD is connected to the SPI1 of Primary Elevator Connector
MicroSD is connected to the on-board MCF51JM MCU
Setting the EuSD (SW1- DIP4) configuration switch to the “Off” position will isolate the SD signals from
the Tower MCU allowing a direct connection between the on-board MCF51JM MCU and the MicroSD
Card slot.
Setting the EuSD configuration switch to the “On” position will cause both the on-board MCF51JM
MCU and Tower MCU SD signals to be simultaneously connected to the MicroSD Card slot. It is
required that on-board MCF51JM MCU firmware detects the status of the EuSD signal and tri-state the
on-board MCF51JM MCU SD signals.
Table 7 - Tower System SD Card Interface Pinout
Elevator
Pin #
B7
B9
B10
B11
B22
A10
Name
SDHC_CLK / SPI1_CLK
SDHC_D3 / SPI1_CS0_b
SDHC_CMD / SPI1_MOSI
SDHC_D0 / SPI1_MISO
GPIO2 / SDHC_D1
GPIO8 / SDHC_D2
Group
SDHC / SPI 1
SDHC / SPI 1
SDHC / SPI 1
SDHC / SPI 1
GPIO / SDHC
GPIO / SDHC
Description
SDHC or SPI Clock
SDHC Chip Select / Data or SPI Chip Select
SDHC Command or SPI Master Out / Slave In
SDHC Data or SPI Master In / Slave Out
General Purpose I/O or SDHC Data
General Purpose I/O or SDHC Data
I/O
O
O
O
I
I/O
I/O
TWR-LCD User’s Manual
Page 7 of 13
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