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PIC16F87 Datasheet(PDF) 5 Page - Microchip Technology |
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PIC16F87 Datasheet(HTML) 5 Page - Microchip Technology |
5 / 230 page 2002-2013 Microchip Technology Inc. DS30487D-page 5 PIC16F87/88 1.0 DEVICE OVERVIEW This document contains device specific information for the operation of the PIC16F87/88 devices. Additional information may be found in the “PIC® Mid-Range MCU Family Reference Manual” (DS33023) which may be downloaded from the Microchip web site. This Reference Manual should be considered a comple- mentary document to this data sheet and is highly recommended 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 PIC® 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 Section 4.7 “Power-Managed Modes” 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 Section 4.5 “Internal Oscillator Block” for further details. • The Timer1 module current consumption has been greatly reduced from 20 A (previous PIC16 devices) to 1.8 A typical (32 kHz at 2V), which is ideal for real-time clock applications. Refer to Section 7.0 “Timer1 Module” 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 Section 15.12 “Watchdog Timer (WDT)” for further details. • Two-Speed Start-up: When the oscillator is configured for LP, XT or HS Oscillator mode, 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 Section 15.12.3 “Two-Speed Clock Start-up Mode” 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. TABLE 1-1: AVAILABLE MEMORY IN PIC16F87/88 DEVICES 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/I2C™ • Two Analog Comparators • AUSART •MCLR (RA5) can be configured as an input Table 1-2 details the pinout of the devices with descriptions and details for each pin. Device Program Flash Data Memory Data EEPROM PIC16F87/88 4K x 14 368 x 8 256 x 8 |
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