4d Systems Amazing 3.5" Display Module powered by a PIC32 PICadillo-35T Picadillo-35T Datenbogen
Produktcode
Picadillo-35T
4D SYSTEMS PICadillo-35T Display Module
© 2014 4D SYSTEMS Page 22 of 31 www.4dsystems.com.au
External Interrupts
6.6.
There are 5 External Interrupts available on the
PICadillo-35T. Please take note that some are
located on pins used for other functions, so
decisions need to be made as to which is utilised
for your application.
Name
Chip Pin
IDE Pin
Header
INT0 (RD0)
72
13
P3 Pin10
INT1 (RE8)
18
2
P3 Pin12
INT2 (RE9)
19
7
P3 Pin2
INT3 (RA14)
66
54
P4 Pin9
INT4 (RA15)
67
53
P4 Pin11
INT3 – This is shared with the I2C Port, and can be
used as a GPIO/INT with the appropriate selection
of the J2 Jumper.
INT4 – This is shared with the I2C Port, and can be
used as a GPIO/INT with the appropriate selection
of the J2 Jumper
Analog Reference
6.7.
It is possible to specify an Analog Reference to be
something other than the internal 3.3V reference
used by default, by applying a voltage to P1 Pin 2.
The external voltage must be between 0V and
3.3V. If an external voltage is not required, this pin
can be used as a GPIO digital pin.
There is a negative voltage reference also, found
on P1 Pin 1, however this generally is unused as
the default negative input is tied to AGND.
Please refer to the Microchip datasheet of the
PIC32 for more information.
Name
Chip Pin
IDE Pin
Header
VREF+ (RA10)
29
42
P1 Pin2
VREF- (RA9)
28
41
P1 Pin1
Note: When these pins are used for Analog
References, they cannot be used for GPIO.
Analog Inputs
6.8.
The PICadillo-35T features 13 Analog Inputs which
are accessible to the User. These are all by default
in the range of 0V to 3.3VDC, however this can be
altered with the use of the Analog Reference pins,
discussed in the previous section.
Each of the Analog Inputs is 10-bit resolution, and
capable up to a maximum of 1Msps read rate.
Each analog input is fitted with current limiting
resistors and clamp diodes, to protect the inputs
from overvoltage conditions, such as applying 5V
to these inputs. If 5V is applied, the circuitry will
clamp the voltage down to 3.3V. It is not possible
to read an analog voltage with a level higher than
3.3V.
Of the 13 Analog Inputs, 12 of them are located on
Header P4, which is the ‘normal’ location for
Arduino/Chipkit style boards. There is an
additional analog Input on the PICadillo-35T which
is found on Header P3 Pin1 (AN14, aka RB14). This
can be utilised as an Analog input if required,
however is typically used to control the Audio
Amplifier Enable.
resistors and clamp diodes, to protect the inputs
from overvoltage conditions, such as applying 5V
to these inputs. If 5V is applied, the circuitry will
clamp the voltage down to 3.3V. It is not possible
to read an analog voltage with a level higher than
3.3V.
Of the 13 Analog Inputs, 12 of them are located on
Header P4, which is the ‘normal’ location for
Arduino/Chipkit style boards. There is an
additional analog Input on the PICadillo-35T which
is found on Header P3 Pin1 (AN14, aka RB14). This
can be utilised as an Analog input if required,
however is typically used to control the Audio
Amplifier Enable.
Name
Chip Pin
IDE Pin
Header
AN0
25
A0 / 14
P4 Pin1
AN1
24
A1 / 15
P4 Pin3
AN2
23
A2 / 16
P4 Pin5
AN3
22
A3 / 17
P4 Pin7
AN4
21
A4 / 18
P4 Pin9
AN5
20
A5 / 19
P4 Pin11
AN6
26
A6 / 20
P4 Pin2
AN7
27
A7 / 21
P4 Pin4
AN8
32
A8 / 22
P4 Pin6
AN9
33
A9 / 23
P4 Pin8
AN10
34
A10 / 24
P4 Pin10
AN11
35
A11 / 25
P4 Pin12
AN14
43
A14 / 33
P3 Pin1