Datasheet

4D SYSTEMS DIABLO16 Processor
© 2014 4D SYSTEMS Page 13 of 33 www.4dsystems.com.au
DIABLO16 PROCESSOR
GPIO - General Purpose IO 5.6.
There are 16 general purpose Input/Output (GPIO)
pins available to the user. These provide flexibility
of individual bit operations along with serving
collectively for byte wise operations using the BUS
functions
DIABLO16 Alternate Pin Configurations
General Purpose I/O
Digital Input
Digital Output
Bus Read
Bus Write
Analog Read
PA0
✓
✓
✓
✓
✓
PA1
✓
✓
✓
✓
✓
PA2
✓
✓
✓
✓
✓
PA3
✓
✓
✓
✓
✓
PA4
✓
✓
✓
✓
PA5
✓
✓
✓
✓
PA6
✓
✓
✓
✓
PA7
✓
✓
✓
✓
PA8
✓
✓
✓
✓
PA9
✓
✓
✓
✓
PA10
✓
✓
✓
✓
PA11
✓
✓
✓
✓
PA12
✓
✓
✓
✓
PA13
✓
✓
✓
✓
PA14
✓
✓
PA15
✓
✓
Please refer to the separate document titled
'DIABLO16-4DGL-Internal-Functions.pdf' for more
information.
PA0-PA3:
General purpose I/O pins, or can serve as Analog
Input pins. Each pin can be individually set for
INPUT or OUTPUT or ANALOG. Power-Up Reset
default is all INPUTS. When set as Digital Inputs,
the pins are 5V tolerant. Digital GPIO can
source/sink 10mA. For more information see
Chapter 16, ‘Specifications and Ratings’.
When set as Analog Inputs, the pins have a 0 to
3.3V range, and have 12 bit resolution.
For more information, see Section 5.15 ‘Analog
Inputs’.
PA4-PA13:
General purpose I/O pins. Each pin can be
individually set for INPUT or OUTPUT. Power-Up
Reset default is all INPUTS. When set as Digital
Inputs, the pins are 5V tolerant. Digital GPIO can
source/sink 10mA. For more information see
Chapter 16, ‘Specifications and Ratings’.
PA14-PA15:
Input only pins. These pins can only be Digital
Inputs.
Note: All GPIO pins are 5.0V tolerant.
System Pins 5.7.
VCC pins (Device Supply Voltage):
Device supply voltage pins. These pins must be
connected to a regulated supply voltage in the
range of 3.0 Volts to 3.6 Volts DC. Nominal
operating voltage is 3.3 Volts.
GND pins (Device Ground):
Device ground pins. These pins must be connected
to system ground.
CLK1, CLK2 pins (Device Oscillator Inputs):
CLK1 and CLK2 are the device oscillator pins.
Connect a 12MHz AT strip cut crystal with 22pF
capacitors from each pin to GND as shown in the
diagram below.
AVCC pin (Analog Supply Voltage):
This is the analog supply voltage pin.
Option 1: This pin should be connected to VCC via
a 12 ohm resistor, and also have a 4.7uF capacitor
to AGND.
Option 2: Connect to VCC via an Inductor with has
a resistance of less than 1ohm and a capacity
greater than 10mA, along with a 4.7uF Capacitor
to AGND. This option provides the best ADC noise
rejection.
This is NOT an analog reference.
AGND pin (Analog Ground):
This is the analog ground pin. This pin should be
connected directly to GND