Microchip Technology MA180025 データシート
PIC18F87J90 FAMILY
DS39933D-page 10
2010 Microchip Technology Inc.
1.2
LCD Driver
The on-chip LCD driver includes many features that
make the integration of displays in low-power
applications easier. These include an integrated
voltage regulator with charge pump that allows contrast
control in software and display operation above device
V
make the integration of displays in low-power
applications easier. These include an integrated
voltage regulator with charge pump that allows contrast
control in software and display operation above device
V
DD
.
1.3
Other Special Features
• Communications: The PIC18F87J90 family
incorporates a range of serial communication
peripherals, including an Addressable USART, a
separate Enhanced USART that supports
LIN/J2602 specification 1.2, and one Master SSP
module capable of both SPI and I
peripherals, including an Addressable USART, a
separate Enhanced USART that supports
LIN/J2602 specification 1.2, and one Master SSP
module capable of both SPI and I
2
C™ (Master and
Slave) modes of operation.
• CCP Modules: All devices in the family incorporate
two Capture/Compare/PWM (CCP) modules. Up to
four different time bases may be used to perform
several different operations at once.
four different time bases may be used to perform
several different operations at once.
• 10-Bit A/D Converter: This module incorporates
programmable acquisition time, allowing for a
channel to be selected and a conversion to be
initiated without waiting for a sampling period and
thus, reducing code overhead.
channel to be selected and a conversion to be
initiated without waiting for a sampling period and
thus, reducing code overhead.
• Charge Time Measurement Unit (CTMU): The
CTMU is a flexible analog module that provides
accurate differential time measurement between
pulse sources, as well as asynchronous pulse
generation.
Together with other on-chip analog modules, the
CTMU can precisely measure time, measure
capacitance or relative changes in capacitance, or
generate output pulses that are independent of the
system clock.
accurate differential time measurement between
pulse sources, as well as asynchronous pulse
generation.
Together with other on-chip analog modules, the
CTMU can precisely measure time, measure
capacitance or relative changes in capacitance, or
generate output pulses that are independent of the
system clock.
• Extended Watchdog Timer (WDT): This
enhanced version incorporates a 16-bit prescaler,
allowing an extended time-out range that is stable
across operating voltage and temperature. See
Section 28.0 “Electrical Characteristics” for
time-out periods.
allowing an extended time-out range that is stable
across operating voltage and temperature. See
Section 28.0 “Electrical Characteristics” for
time-out periods.
• Real-Time Clock and Calendar Module
(RTCC): The RTCC module is intended for appli-
cations requiring that accurate time be maintained
for extended periods of time with minimum to no
intervention from the CPU.
The module is a 100-year clock and calendar
with automatic leap year detection. The range of
the clock is from 00:00:00 (midnight) on
January 1, 2000 to 23:59:59 on
December 31, 2099.
cations requiring that accurate time be maintained
for extended periods of time with minimum to no
intervention from the CPU.
The module is a 100-year clock and calendar
with automatic leap year detection. The range of
the clock is from 00:00:00 (midnight) on
January 1, 2000 to 23:59:59 on
December 31, 2099.
1.4
Details on Individual Family
Members
Members
Devices in the PIC18F87J90 family are available in
64-pin and 80-pin packages. Block diagrams for the
two groups are shown in Figure 1-1 and Figure 1-2.
The devices are differentiated from each other in four
ways:
1.
64-pin and 80-pin packages. Block diagrams for the
two groups are shown in Figure 1-1 and Figure 1-2.
The devices are differentiated from each other in four
ways:
1.
Flash program memory (two sizes, 64 Kbytes
for PIC18FX6J90 devices and 128 Kbytes for
PIC18FX7J90 devices).
for PIC18FX6J90 devices and 128 Kbytes for
PIC18FX7J90 devices).
2.
Data RAM (3,923 bytes RAM for both
PIC18FX6J90 and PIC18FX7J90 devices).
PIC18FX6J90 and PIC18FX7J90 devices).
3.
I/O ports (7 bidirectional ports on PIC18F6XJ90
devices, 9 bidirectional ports on PIC18F8XJ90
devices).
devices, 9 bidirectional ports on PIC18F8XJ90
devices).
4.
LCD Pixels: 132 pixels (33 SEGs x 4 COMs) can
be driven by 64-pin devices; 192 pixels
(48 SEGs x 4 COMs) can be driven by 80-pin
devices.
be driven by 64-pin devices; 192 pixels
(48 SEGs x 4 COMs) can be driven by 80-pin
devices.
All other features for devices in this family are identical.
These are summarized in Table 1-1 and Table 1-2.
The pinouts for all devices are listed in Table 1-3 and
Table 1-4.
These are summarized in Table 1-1 and Table 1-2.
The pinouts for all devices are listed in Table 1-3 and
Table 1-4.