PICASO datasheet(5/24 Pages) ETC2

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4D SYSTEMS

PICASO Processor

Page 5 of 23

www.4dsystems.com.au

4. Pin Configuration and Summary

PICASO Processor Pin Out

Symbol I/O Description

IO1

I/O

General Purpose IO1 pin. This pin is 5.0V tolerant.

4-Wire Resistive Touch Screen Right signal. Connect this pin to XR or X+

signal of the touch panel.

4-Wire Resistive Touch Screen Up signal. Connect this pin to YU or Y+ signal

of the touch panel.

SCK

SPI Serial Clock output. SD memory card use only. Connect this pin to the SPI

Serial Clock (SCK) signal of the memory card.

SDI

SPI Serial Data Input. SD memory card use only. Connect this pin to the SPI

Serial Data Out (SDO) signal of the memory card.

SDO

SPI Serial Data Output. SD memory card use only. Connect this pin to the SPI

Serial Data In (SDI) signal of the memory card.

RESET

Master Reset signal. Connect a 4.7K resistor from this pin to VCC.

SDCS

SD Memory-Card Chip Select. SD memory card use only. Connect this pin to

the Chip Enable (CS) signal of the memory card.

9, 20, 25, 41

GND

Device Ground.

10, 19, 26,

38, 57

VCC

Device Positive Supply.

I = Input, O = Output, P = Power, A = Analogue

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