DSPIC30F5011 MICROCHIP [Microchip Technology], DSPIC30F5011 Datasheet - Page 134
DSPIC30F5011
Manufacturer Part Number
DSPIC30F5011
Description
High-Performance Digital Signal Controllers
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.DSPIC30F5011.pdf
(220 pages)
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dsPIC30F5011/5013
19.12 Configuring Analog Port Pins
The use of the ADPCFG and TRIS registers control the
operation of the A/D port pins. The port pins that are
desired as analog inputs must have their correspond-
ing TRIS bit set (input). If the TRIS bit is cleared (out-
put), the digital output level (V
converted.
The A/D operation is independent of the state of the
CH0SA<3:0>/CH0SB<3:0> bits and the TRIS bits.
When reading the Port register, all pins configured as
analog input channels will read as cleared.
Pins configured as digital inputs will not convert an ana-
log input. Analog levels on any pin that is defined as a
digital input (including the ANx pins) may cause the
input buffer to consume current that exceeds the
device specifications.
DS70116C-page 132
OH
or V
OL
) will be
Preliminary
19.13 Connection Considerations
The analog inputs have diodes to V
protection. This requires that the analog input be
between V
range by greater than 0.3V (either direction), one of the
diodes becomes forward biased and it may damage the
device if the input current specification is exceeded.
An external RC filter is sometimes added for anti-
aliasing of the input signal. The R component should be
selected to ensure that the sampling time requirements
are satisfied. Any external components connected (via
high impedance) to an analog input pin (capacitor,
zener diode, etc.) should have very little leakage
current at the pin.
DD
and V
SS
. If the input voltage exceeds this
2004 Microchip Technology Inc.
DD
and V
SS
as ESD