DSPIC33FJ64MC506-I/PT Microchip Technology Inc., DSPIC33FJ64MC506-I/PT Datasheet - Page 162
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DSPIC33FJ64MC506-I/PT
Manufacturer Part Number
DSPIC33FJ64MC506-I/PT
Description
DSP, 16-Bit, 64KB Flash, 8KB RAM, 53 I/O, TQFP-64
Manufacturer
Microchip Technology Inc.
Type
DSPr
Datasheet
1.DSPIC33FJ64MC506-IPT.pdf
(370 pages)
Specifications of DSPIC33FJ64MC506-I/PT
A/d Inputs
16-Channels, 12-Bit
Comparators
8
Cpu Speed
40 MIPS
Eeprom Memory
0 Bytes
Input Output
53
Interface
CAN, I2C, SPI, UART/USART
Ios
53
Memory Type
Flash
Number Of Bits
16
Package Type
64-pin TQFP
Programmable Memory
64K Bytes
Ram Size
8K Bytes
Timers
9-16-bit, 4-32-bit
Voltage, Range
3-3.6
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
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Part Number:
DSPIC33FJ64MC506-I/PT
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dsPIC33F
10.2
In addition to the PORT, LAT and TRIS registers for
data control, each port pin can also be individually
configured for either digital or open-drain output. This is
controlled by the Open-Drain Control register, ODCx,
associated with each port. Setting any of the bits con-
figures the corresponding pin to act as an open-drain
output.
The open-drain feature allows the generation of
outputs higher than V
tal only pins by using external pull-up resistors. (The
open-drain I/O feature is not supported on pins which
have analog functionality multiplexed on the pin.) The
maximum open-drain voltage allowed is the same as
the maximum V
feature is supported for both port pin and peripheral
configurations.
10.3
The use of the ADxPCFGH, ADxPCFGL and TRIS
registers control the operation of the ADC port pins.
The port pins that are desired as analog inputs must
have their corresponding TRIS bit set (input). If the
TRIS bit is cleared (output), the digital output level (V
or V
Clearing any bit in the ADxPCFGH or ADxPCFGL reg-
ister configures the corresponding bit to be an analog
pin. This is also the Reset state of any I/O pin that has
an analog (ANx) function associated with it.
When reading the PORT register, all pins configured as
analog input channels will read as cleared (a low level).
Pins configured as digital inputs will not convert an
analog input. Analog levels on any pin that is defined as
a digital input (including the ANx pins) can cause the
input buffer to consume current that exceeds the
device specifications.
EXAMPLE 10-1:
DS70165E-page 160
Note:
Note:
MOV
MOV
NOP
btss
OL
) is converted.
Open-Drain Configuration
Configuring Analog Port Pins
0xFF00, W0
W0, TRISBB
PORTB, #13
In devices with two ADC modules, if the
corresponding
AD1PCFGH(L) and AD2PCFGH(L) is
cleared, the pin is configured as an analog
input.
The voltage on an analog input pin can be
between -0.3V to (V
IH
specification. The open-drain output
DD
PORT WRITE/READ EXAMPLE
(e.g., 5V) on any desired digi-
PCFG
DD
; Configure PORTB<15:8> as inputs
; and PORTB<7:0> as outputs
; Delay 1 cycle
; Next Instruction
+ 0.3 V).
bit
in
either
Preliminary
OH
10.4
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.
10.5
The input change notification function of the I/O ports
allows the dsPIC33F devices to generate interrupt
requests to the processor
change-of-state on selected input pins. This feature is
capable of detecting input change-of-states even in
Sleep mode, when the clocks are disabled. Depending
on the device pin count, there are up to 24 external sig-
nals (CN0 through CN23) that can be selected
(enabled) for generating an interrupt request on a
change-of-state.
There are four control registers associated with the CN
module. The CNEN1 and CNEN2 registers contain the
CN interrupt enable (CNxIE) control bits for each of the
CN input pins. Setting any of these bits enables a CN
interrupt for the corresponding pins.
Each CN pin also has a weak pull-up connected to it.
The pull-ups act as a current source that is connected
to the pin and eliminate the need for external resistors
when push button or keypad devices are connected.
The pull-ups are enabled separately using the CNPU1
and CNPU2 registers, which contain the weak pull-up
enable (CNxPUE) bits for each of the CN pins. Setting
any of the control bits enables the weak pull-ups for the
corresponding pins.
Note:
I/O Port Write/Read Timing
Input Change Notification
Pull-ups on change notification pins
should always be disabled whenever the
port pin is configured as a digital output.
© 2007 Microchip Technology Inc.
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