PIC16F887-E/P Microchip Technology Inc., PIC16F887-E/P Datasheet - Page 230

• Manufacturer Part Number: PIC16F887-E/P
• Description: 40 PIN, 14KB FLASH, 368 RAM, 36 I/O, PDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F887-E/P

• A/d Inputs: 14-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Frequency: 20 MHz
• Input Output: 35
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 14K Bytes
• Ram Size: 368 Bytes
• Resistance, Drain To Source On: Bytes
• Serial Interface: MSSP or EUSART
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC16F882/883/884/886/887
FIGURE 14-11:
DS41291E-page 228
*
External
Connector
Signals
Data I/O
Isolation devices (as required)
CLK
+5V
V
0V
PP
*
To Normal
Connections
To Normal
Connections
TYPICAL IN-CIRCUIT
SERIAL
PROGRAMMING™
CONNECTION
*
*
*
V
V
RE3/MCLR/V
RB6
RB7
PIC16F882/883/
DD
SS
884/886/887
PP
14.10 Low-Voltage (Single-Supply) ICSP
The LVP bit of the Configuration Word enables
low-voltage ICSP programming. This mode allows the
microcontroller to be programmed via ICSP using a
V
means that V
can instead be left at the normal operating voltage. In
this mode, the RB3/PGM pin is dedicated to the
programming function and ceases to be a general
purpose I/O pin. During programming, V
the MCLR pin. To enter Programming mode, V
be applied to the RB3/PGM provided the LVP bit is set.
The LVP bit defaults to on (‘1’) from the factory.
If Low-Voltage Programming mode is not used, the LVP
bit can be programmed to a ‘0’ and RB3/PGM becomes
a digital I/O pin. However, the LVP bit may only be
programmed when programming is entered with V
on MCLR. The LVP bit can only be charged when using
high voltage on MCLR.
It should be noted, that once the LVP bit is programmed
to ‘0’, only the High-Voltage Programming mode is
available and only High-Voltage Programming mode
can be used to program the device.
When using low-voltage ICSP, the part must be
supplied at 4.5V to 5.5V if a bulk erase will be executed.
This includes reprogramming of the code-protect bits
from an on state to an off state. For all other cases of
low-voltage ICSP, the part may be programmed at the
normal operating voltage. This means calibration
values, unique user IDs or user code can be
reprogrammed or added.
DD
Note 1: The High-Voltage Programming mode is
source in the operating voltage range. This only
2: While in Low-Voltage ICSP mode, the
3: When using Low-Voltage ICSP Program-
4: RB3 should not be allowed to float if LVP
5: LVP mode is enabled by default on all
Programming
always available, regardless of the state
of the LVP bit, by applying V
MCLR pin.
RB3 pin can no longer be used as a
general purpose I/O pin.
ming (LVP) and the pull-ups on PORTB
are enabled, bit 3 in the TRISB register
must be cleared to disable the pull-up on
RB3 and ensure the proper operation of
the device.
is enabled. An external pull-down device
should be used to default the device to
normal operating mode. If RB3 floats
high, the PIC16F882/883/884/886/887
device will enter Programming mode.
devices shipped from Microchip. It can be
disabled by clearing the LVP bit in the
CONFIG register.
PP
does not have to be brought to V
© 2008 Microchip Technology Inc.
DD
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