MA240026 Microchip Technology, MA240026 Datasheet - Page 209

• Manufacturer Part Number: MA240026
• Description: Daughter Cards & OEM Boards PIC24FJ16MC102 Plug-In Module
• Manufacturer: Microchip Technology

Specifications of MA240026

• Rohs: yes
• Data Bus Width: 16 bit
• Description/function: PIC24F 28 Pin QFN to 100 Pin Plug-in-Module
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3 V to 3.6 V

22.0
© 2011 Microchip Technology Inc.
Note 1: This data sheet summarizes the fea-
2: It
3: Some registers and associated bits
CHARGE TIME
MEASUREMENT UNIT (CTMU)
tures of the PIC24FJ16MC101/102 fam-
ily of devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 11. “Charge
Time
(DS39724)
Reference Manual”, which is available
from
(www.microchip.com).
specifications in
cal Characteristics”
supercede any specifications that may be
provided in PIC24F Family Reference
Manual sections.
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization”
this data sheet for device-specific register
and bit information.
is
Measurement
important
the
in
Microchip
the
Section 26.0 “Electri-
to
of this data sheet,
“PIC24F
note
Unit
web
that
(CTMU)”
Family
site
the
Preliminary
in
The Charge Time Measurement Unit is a flexible ana-
log module that provides accurate differential time
measurement between pulse sources, as well as
asynchronous pulse generation. Its key features
include:
• Four edge input trigger sources
• Polarity control for each edge source
• Control of edge sequence
• Control of response to edges
• Precise time measurement resolution of 200 ps
• Accurate current source suitable for capacitive
• On-chip temperature measurement using a
Together with other on-chip analog modules, the CTMU
can be used to precisely measure time, measure
capacitance, measure relative changes in capacitance
or generate output pulses that are independent of the
system clock.
The CTMU module is ideal for interfacing with capaci-
tive-based sensors.The CTMU is controlled through
three
CTMUICON. CTMUCON1 enables the module, the
Edge delay generation, sequencing of edges and con-
trols the current source and the output trigger.
CTMUCON2 controls the edge source selection, edge
source polarity selection and edge sampling mode. The
CTMUICON register controls the selection and trim of
the current source.
Figure 22-1
measurement
built-in diode
registers:
PIC24FJ16MC101/102
shows the CTMU block diagram.
CTMUCON1,
CTMUCON2
DS39997B-page 209
and