MA160014 Microchip Technology, MA160014 Datasheet - Page 317

• Manufacturer Part Number: MA160014
• Description: MOD PLUG-IN 44PIN PIC18LF45K22
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of MA160014

• Accessory Type: Plug-In Module (PIM) - PIC18LF45K10
• Product: Microcontroller Modules
• Data Bus Width: 8 bit
• Core Processor: PIC18LF45K22
• Interface Type: I2C, SPI
• Operating Supply Voltage: 1.8 V to 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM PIC18 Explorer, DM183032
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

19.0
The Charge Time Measurement Unit (CTMU) is a
flexible
differential time measurement between pulse sources,
as well as asynchronous pulse generation. By working
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 with a specific time delay. The CTMU is
ideal for interfacing with capacitive-based sensors.
The module includes the following key features:
• Up to 28
• On-chip precision current source
• Four-edge input trigger sources
• Polarity control for each edge source
• Control of edge sequence
• Control of response to edges
FIGURE 19-1:
 2010 Microchip Technology Inc.
time measurement input
CHARGE TIME
MEASUREMENT UNIT (CTMU)
analog
(1)
ECCP2
ECCP1
CTED1
CTED2
channels available for capacitive or
module
CTMU BLOCK DIAGRAM
EDGEN
EDGSEQEN
EDG1SELx
EDG1POL
EDG2SELx
EDG2POL
that
provides
Control
Logic
Edge
EDG1STAT
EDG2STAT
accurate
A/D Converter
CTMUCONH/CTMUCONL
Preliminary
Current Source
CTMUICON
Current
Control
Comparator 2
• Time measurement resolution of 1 nanosecond
• High precision time measurement
• Time delay of external or internal signal
• Accurate current source suitable for capacitive
The CTMU works in conjunction with the A/D Converter
to provide up to 28
measurement, depending on the specific device and
the number of A/D channels available. When config-
ured for time delay, the CTMU is connected to the
C12IN1- input of Comparator 2. The level-sensitive
input edge sources can be selected from four sources:
two external input pins (CTED1/CTED2) or the ECCP1/
(E)CCP2 Special Event Triggers.
Figure 19-1
Input
ITRIM<5:0>
IRNG<1:0>
asynchronous to system clock
measurement
Note 1: PIC18(L)F2XK22 devices have up to 17
PIC18(L)F2X/4XK22
provides a block diagram of the CTMU.
channels available.
Comparator 2 Output
Generator
Control
CTMU
Pulse
Logic
(1)
TGEN
IDISSEN
CTTRIG
channels for time or charge
DS41412D-page 317
CTPLS