PIC16F87/88
1.0
DEVICE OVERVIEW
TABLE 1-1:
This document contains device specific information for
the operation of the PIC16F87/88 devices. Additional
information may be found in the
PICmicro
®
Mid-Range
MCU Reference Manual
(DS33023) which may be
downloaded from the Microchip web site. This Refer-
ence Manual should be considered a complementary
document to this data sheet, and is highly recom-
mended reading for a better understanding of the
device architecture and operation of the peripheral
modules.
The PIC16F87/88 belongs to the Mid-Range family of
the PICmicro
®
devices. Block diagrams of the devices
are shown in Figure 1-1 and Figure 1-2. These devices
contain features that are new to the PIC16 product line:
• Low-power modes: RC_RUN allows the core and
peripherals to be clocked from the INTRC, while
SEC_RUN allows the core and peripherals to be
clocked from the low-power Timer1. Refer to
for
further details.
• Internal RC oscillator with eight selectable
frequencies, including 31.25 kHz, 125 kHz,
250 kHz, 500 kHz, 1 MHz, 2 MHz, 4 MHz, and
8 MHz. The INTRC can be configured as a
primary or secondary clock source. Refer to
for
further details.
• The Timer1 module current consumption has
been greatly reduced from 20
µA
(previous PIC16
devices) to 1.8
µA
typical (32 kHz at 2V), which is
ideal for real-time clock applications. Refer to
for further details.
• Extended Watchdog Timer (WDT) that can have a
programmable period from 1 ms to 268s. The
WDT has its own 16-bit prescaler. Refer to
for
further details.
• Two-Speed Start-up: When the oscillator is
configured for LP, XT, or HS, this feature will clock
the device from the INTRC while the oscillator is
warming up. This, in turn, will enable almost
immediate code execution. Refer to
for further details.
• Fail-Safe Clock Monitor: This feature will allow the
device to continue operation if the primary or
secondary clock source fails by switching over to
the INTRC.
• The A/D module has a new register for PIC16
devices named ANSEL. This register allows
easier configuration of analog or digital I/O pins.
AVAILABLE MEMORY IN
PIC16F87/88 DEVICES
Program
FLASH
4K x 14
Data
Memory
368 x 8
Data
EEPROM
256 x 8
Device
PIC16F87/88
There are 16 I/O pins that are user configurable on a
pin-to-pin basis. Some pins are multiplexed with other
device functions. These functions include:
•
•
•
•
•
•
•
•
•
•
External Interrupt
Change on PORTB Interrupt
Timer0 Clock Input
Low-power Timer1 Clock/Oscillator
Capture/Compare/PWM
10-bit, 7-channel A/D Converter (PIC16F88 only)
SPI™/I
2
C™
Two Analog Comparators
USART
MCLR (RA5) can be configured as an Input
descriptions and details for each pin.
2003 Microchip Technology Inc.
Preliminary
DS30487B-page 5
MICROCHIP [ MICROCHIP TECHNOLOGY ]
