MA240029 Microchip Technology, MA240029 Datasheet - Page 168

• Manufacturer Part Number: MA240029
• Description: Daughter Cards & OEM Boards PIC24FJ128GA310 Gen Purpose PIM
• Manufacturer: Microchip Technology

Specifications of MA240029

• Rohs: yes
• Product: Daughter Cards
• Core: PIC
• Description/function: Plug-in module
• Interface Type: I2C, SPI
• Tool Is For Evaluation Of: PIC24FJ128GA310
• For Use With: Explorer 16 Development Board

corresponding pin to act as an open-drain output.
PIC24FJ128GA310 FAMILY
11.1.1
One instruction cycle is required between a port direction
change or port write operation and a read operation of
the same port. Typically, this instruction would be a NOP.
11.1.2
In addition to the PORT, LAT and TRIS registers for data
control, each port pin can also be individually configured
for either a digital or open-drain output. This is controlled
by the Open-Drain Control register, ODCx, associated
with each port. Setting any of the bits configures the
The open-drain feature allows the generation of
outputs higher than V
digital only pins by using external pull-up resistors. The
maximum open-drain voltage allowed is the same as
the maximum V
TABLE 11-1:
TABLE 11-2:
DS39996F-page 168
Analog Input
Analog Output
Digital Input
Digital Output
PORTA<15:14, 7:0>
PORTB<15:7, 5:2>
PORTC<3:1>
PORTD<15:8, 5:0>
PORTE<9:8, 4:0>
PORTF<13:12, 8:0>
PORTG<15:12, 9, 6:0>
PORTA<10:9>
PORTB<6, 1:0>
PORTC<15:12, 4>
PORTD<7:6>
PORTE<7:5>
PORTG<8:7>
Note 1:
Pin Function
Not all of these pins are implemented in 64-pin or 80-pin devices. Refer to
for a complete description of port pin implementation.
I/O PORT WRITE/READ TIMING
OPEN-DRAIN CONFIGURATION
Port or Pin
(1)
(1)
(1)
IH
specification.
CONFIGURING ANALOG/DIGITAL FUNCTION OF AN I/O PIN
INPUT VOLTAGE LEVELS FOR PORT OR PIN TOLERATED DESCRIPTION INPUT
(1)
(1)
(1)
(1)
(1)
DD
ANSx Setting
(1)
(e.g., 5V) on any desired
1
1
0
0
TRISx Setting
Tolerated Input
1
1
1
0
5.5V
V
DD
11.2
The ANSx and TRISx registers control the operation of
the pins with analog function. Each port pin with analog
function is associated with one of the ANS bits (see
Register 11-1
the pin function should be analog or digital. Refer to
Table 11-1
ANSx and TRISx bit settings.
When reading the PORT register, all pins configured as
analog input channels will read as cleared (a low level).
11.2.1
The voltage tolerance of pins used as device inputs is
dependent on the pin’s input function. Most input pins are
able to handle DC voltages of up to 5.5V, a level typical
for digital logic circuits. However, several pins can only
tolerate voltages up to V
V
Table 11-2
Refer to
more details.
It is recommended to keep ANSx = 1.
It is recommended to keep ANSx = 1.
Firmware must wait at least one instruction cycle
after configuring a pin as a digital input before a valid
input value can be read.
Make sure to disable the analog output function on
the pin if any is present.
DD
on these pins should always be avoided.
Section 32.0 “Electrical Characteristics”
Configuring Analog Port Pins
(ANSx)
summarizes the different voltage tolerances.
for detailed behavior of the pin for different
ANALOG INPUT PINS AND
VOLTAGE CONSIDERATIONS
Tolerates input levels above V
for most standard logic.
Only V
through
 2010-2011 Microchip Technology Inc.
DD
Section 1.0 “Device Overview”
Comments
Register
input levels are tolerated.
DD
. Voltage excursions beyond
Description
11-6), which decides if
DD
; useful
for