PIC24FJ128GA110-I/PT Microchip Technology, PIC24FJ128GA110-I/PT Datasheet - Page 232

• Manufacturer Part Number: PIC24FJ128GA110-I/PT
• Description: IC PIC MCU FLASH 100TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 24Fr

Specifications of PIC24FJ128GA110-I/PT

• Core Size: 16-Bit
• Program Memory Size: 128KB (43K x 24)
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, PMP, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFQFP
• Controller Family/series: PIC24
• No. Of I/o's: 85
• Ram Memory Size: 16KB
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 876-1004 - PIC24 BREAKOUT BOARDMA240015 - BOARD MCV PIM FOR 24F256GADM240011 - KIT STARTER MPLAB FOR PIC24F MCU
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC24FJ256GA110 FAMILY
23.2
Time measurements on the pulse width can be similarly
performed, using the A/D module’s internal capacitor
(C
Figure 23-2 shows the external connections used for
time measurements, and how the CTMU and A/D mod-
ules are related in this application. This example also
shows both edge events coming from the external
CTEDG pins, but other configurations using internal
edge sources are possible. A detailed discussion on
measuring capacitance and time with the CTMU module
is provided in the “PIC24F Family Reference Manual”.
23.3
The CTMU module can also generate an output pulse
with edges that are not synchronous with the device’s
system clock. More specifically, it can generate a pulse
with a programmable delay from an edge event input to
the module.
FIGURE 23-2:
FIGURE 23-3:
DS39905B-page 230
AD
) and a precision resistor for current calibration.
Measuring Time
Pulse Generation and Delay
TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR TIME
MEASUREMENT
TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR PULSE
DELAY GENERATION
CTEDG1
C2INB
C
CTEDG1
CTEDG2
DELAY
ANx
R
PR
EDG1
CV
PIC24FJ Device
EDG2
Preliminary
EDG1
Current Source
Comparator
REF
C
PIC24FJ Device
AD
A/D Converter
CTMU
C2
Current Source
CTMU
Output Pulse
When the module is configured for pulse generation
delay by setting the TGEN bit (CTMUCON<12>), the
internal current source is connected to the B input of
Comparator 2. A capacitor (C
the Comparator 2 pin C2INB, and the comparator volt-
age reference, CV
is then configured for a specific trip point. The module
begins to charge C
detected. When C
point, a pulse is output on CTPLS. The length of the
pulse delay is determined by the value of C
the CV
Figure 23-3 shows the external connections for pulse
generation, as well as the relationship of the different
analog modules required. While CTEDG1 is shown as
the input pulse source, other options are available. A
detailed discussion on pulse generation with the CTMU
module is provided in the “PIC24F Family Reference
Manual”.
REF
trip point.
DELAY
REF
CTPLS
DELAY
, is connected to C2INA. CV
© 2008 Microchip Technology Inc.
charges above the CV
when an edge event is
DELAY
) is connected to
DELAY
REF
and
REF
trip