PIC18F45K80-I/PT Microchip Technology, PIC18F45K80-I/PT Datasheet - Page 241

• Manufacturer Part Number: PIC18F45K80-I/PT
• Description: MCU PIC 32KB FLASH 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F45K80-I/PT

• Core Size: 8-Bit
• Program Memory Size: 32KB (16K x 16)
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Core Processor: PIC
• Speed: 64MHz
• Connectivity: ECAN, I²C, LIN, SPI, UART/USART
• Number Of I /o: 35
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.6K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 11x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP
• Controller Family/series: PIC18
• Ram Memory Size: 4KB
• Cpu Speed: 16MIPS
• No. Of Pwm Channels: 5
• Embedded Interface Type: I2C, SPI, USART
• Processor Series: PIC18F45K80
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 64 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 5
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.0
The Charge Time Measurement Unit (CTMU) is a
flexible analog module that provides accurate differen-
tial time measurement between pulse sources, as well
as asynchronous pulse generation. By working with
other on-chip analog modules, the CTMU can precisely
measure time, capacitance and 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 these key features:
• Up to 11 channels available for capacitive or time
• Low-cost temperature measurement using on-chip
• On-chip precision current source
• Four-edge input trigger sources
• Polarity control for each edge source
FIGURE 18-1:
 2011 Microchip Technology Inc.
measurement input
diode channel
CHARGE TIME
MEASUREMENT UNIT (CTMU)
ECCP1
CTED1
CTED2
CCP2
EDGEN
EDGSEQEN
EDG1POL
EDG2POL
EDG1SEL<1:0>
EDG2SEL<1:0>
CTMU BLOCK DIAGRAM
Control
Edge
Logic
EDG1STAT
EDG2STAT
A/D Converter
CTMUCONH:CTMUCONL
Preliminary
Current Source
CTMUICON
Current
Control
PIC18F66K80 FAMILY
Comparator 2
Input
ITRIM<5:0>
IRNG<1:0>
• Control of edge sequence
• Control of response to edges
• 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 11 channels for time or charge
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 one of
the analog comparators. The level-sensitive input edge
sources can be selected from four sources: two
external inputs or the ECCP1/CCP2 Special Event
Triggers.
The CTMU special event can trigger the Analog-to-Digital
Converter module.
Figure 18-1
asynchronous to system clock
measurement
Comparator 2 Output
provides a block diagram of the CTMU.
Generator
Control
CTMU
Logic
Pulse
TGEN
IDISSEN
CTTRIG
DS39977C-page 241
A/D Trigger
CTPLS