D i d o H a r d w a r e M a n u a l
v . 1 . 0 . 5
7.10
Touchscreen
The touch screen controller is a TSC2003 resistive 4-wire
controller connected to the I2C-3 bus. It also provides an
auxiliary 12-bit A/D converter channel.
Device address is 1001000b.
The following table describes the interface signals:
Connector Pin
Pin
name
Function
Notes
TSC_XP
J1.39
X+ Position Input
Please consider
the use of ESD
protection
devices on carrier
board when these
pins are
connected to
actual touch
screen.
TSC_XM
J1.41
X- Position Input
TSC_YP
J1.43
Y+ Position Input
TSC_YM
J1.45
Y- Position Input
7.11
EEPROM
One EEPROM is available to provide additional non-volatile
storage area for user-specific usage. It is connected to the
I2C-3 bus. A1 and A0 bits of address can be configured at
carrier board level
Device address is 10100[A1][A0]b.
The following table describes the interface signals:
Connector Pin
Pin
name
Function
Notes
EEPROM_A0
J1.10
I²C Address pins
A1 and A0 bits of
address can be
configured at
carrier board
level
EEPROM_A1
J1.12
EEPROM_WP
J2.114
Active high
7.12
Keypad controller
DIDO provides a 8x8 keypad interface that is implemented in a
dedicated MAX controller connected to the I2C-3
bus.
Device address is 0111000b.
August, 2014
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