Microchip Technology ARD00385 Data Sheet

DS39957D-page 10

 2009-2011 Microchip Technology Inc.

The PIC18F87K90 family is also largely
pin-compatible with other PIC18 families, such as the
PIC18F8720, PIC18F8722, PIC18F85J11, PIC18F8490,
PIC18F85J90, PIC18F87J90 and PIC18F87J93 families
of microcontrollers with LCD drivers. This allows a new
dimension to the evolution of applications, allowing
developers to select different price points within
Microchip’s PIC18 portfolio, while maintaining a similar
feature set. 

The on-chip LCD driver includes many features that
ease the integration of displays in low-power
applications. These include an integrated internal
resistor ladder, so bias voltages can be generated
internally. This enables software-controlled contrast
control and eliminates the need for external bias
voltage resistors.

• Communications: The PIC18F87K90 family 

incorporates a range of serial communication 
peripherals including two Enhanced USART, that 
support LIN/J2602, and two Master SSP modules 
capable of both SPI and I

2

C™ (Master and Slave) 

modes of operation.

• CCP Modules: PIC18F87K90 family devices 

incorporate up to seven or five Capture/
Compare/PWM (CCP) modules. Up to six differ-
ent time bases can be used to perform several 
different operations at once.

• ECCP Modules: The PIC18F87K90 family has 

three Enhanced CCP (ECCP) modules to 
maximize flexibility in control applications:
- Up to eight different time bases for performing 

several different operations at once

- Up to four PWM outputs for each module, for 

a total of 12 PWMs

- Other beneficial features, such as polarity 

selection, programmable dead time, 
auto-shutdown and restart, and Half-Bridge 
and Full-Bridge Output modes

• 12-Bit A/D Converter: The PIC18F87K90 family 

has differential ADC. It incorporates program-
mable acquisition time, allowing for a channel to 
be selected and a conversion to be initiated with-
out waiting for a sampling period, and thus, 
reducing code overhead.

• Charge Time Measurement Unit (CTMU): The 

CTMU is a flexible analog module that provides accu-
rate 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.

• LP Watchdog Timer (WDT): This enhanced 

version incorporates a 22-bit prescaler, allowing 
an extended time-out range that is stable across 
operating voltage and temperature. See 

 for 

time-out periods.

• Real-Time Clock and Calendar Module (RTCC): 

The RTCC module is intended for applications 
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. 

Devices in the PIC18F87K90 family are available in
64-pin and 80-pin packages. Block diagrams for the
two groups are shown in 

 and 

The devices are differentiated from each other in these ways:
• Flash Program Memory:

- PIC18FX5K90 (PIC18F65K90 and 

PIC18F85K90) – 32 Kbytes

- PIC18FX6K90 (PIC18F66K90 and 

PIC18F86K90) – 64 Kbytes

- PIC18FX7K90 (PIC18F67K90 and 

PIC18F87K90) – 128 Kbytes

• Data RAM:

- All devices except PIC18FX5K90 – 4 Kbytes
- PIC18FX5K90 – 2 Kbytes

• I/O Ports:

- PIC18F6XK90 (64-pin devices) – 

7 bidirectional ports

- PIC18F8XK90 (80-pin devices) – 

9 bidirectional ports

• LCD Pixels:

- PIC18F6XK90 – 132 pixels (33 SEGs x 4 COMs)
- PIC18F8XK90 – 192 pixels (48 SEGs x 4 COMs)

• CCP Module:

- All devices except PIC18FX5K90 have seven CCP 

modules, PIC18FX5K90 has only five CCP modules

• Timers:

- All devices except 18FX5K90 have six 8-bit timers 

and five 16-bit timers, PIC18FX5K90 has only four 
8-bit timers and four 16-bit timers. 

• A/D Channels:

- All PIC18F8XK90 devices have 24 A/D 

channels, all PIC18F6XK90 devices have 

16 A/D channels

All other features for devices in this family are identical.
These are summarized in 

 and 

.

The pinouts for all devices are listed in 

 and

.