PIC16F914-I/PT Microchip Technology, PIC16F914-I/PT Datasheet - Page 205

• Manufacturer Part Number: PIC16F914-I/PT
• Description: IC PIC MCU FLASH 4KX14 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F914-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 7KB (4K x 14)
• Package / Case: 44-TQFP, 44-VQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 35
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SSP/I2C/AUSART/SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DV164120, DM163029
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

16.8
If
programmed, the on-chip program memory can be
read out using ICSP for verification purposes.
16.9
Four memory locations (2000h-2003h) are designated
as ID locations where the user can store checksum or
other code identification numbers. These locations are
not accessible during normal execution, but are
readable and writable during Program/Verify mode.
Only the Least Significant 7 bits of the ID locations are
used.
16.10 In-Circuit Serial Programming
The PIC16F91X microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with two lines for clock and data and three
other lines for:
• power
• ground
• programming voltage
This allows customers to manufacture boards with
unprogrammed devices and then program the micro-
controller just before shipping the product. This also
allows the most recent firmware or a custom firmware
to be programmed.
The device is placed into a Program/Verify mode by
holding
RB6/ICSPCLK/ICDCK/SEG14 pins low, while raising the
MCLR (V
Memory Programming Specification” (DS41244) for more
information. RB7/ICSPDAT/ICDDAT/SEG13 becomes the
programming data and RB6/ICSPCLK/ICDCK/SEG14
becomes
RB7/ICSPDAT/ICDDAT/SEG13
RB6/ICSPCLK/ICDCK/SEG14 are Schmitt Trigger inputs
in this mode.
After Reset, to place the device into Program/Verify
mode, the Program Counter (PC) is at location 00h. A
6-bit command is then supplied to the device.
Depending on the command, 14 bits of program data
are then supplied to or from the device, depending on
whether the command was a load or a read. For
complete details of serial programming, please refer to
the “PIC16F91X Memory Programming Specification”
(DS41244).
 2004 Microchip Technology Inc.
Note:
the
Code Protection
ID Locations
code
PP
the
The entire data EEPROM and Flash
program memory will be erased when the
code protection is turned off. See the
“PIC16F91X
Specification” (DS41244) for more infor-
mation.
) pin from V
the
protection
RB7/ICSPDAT/ICDDAT/SEG13
programming
IL
to V
Memory
bit(s)
IHH
. See “PIC16F91X
have
clock.
Programming
not
been
Both
and
and
Preliminary
A typical In-Circuit Serial Programming connection is
shown in Figure 16-11.
FIGURE 16-11:
External
Connector
Signals
Data I/O
CLK
+5V
V
0V
PP
* Isolation devices (as required)
*
To Normal
Connections
To Normal
Connections
TYPICAL IN-CIRCUIT
SERIAL PROGRAMMING
CONNECTION
*
PIC16F91X
*
*
DS41250B-page 203
V
V
RE3/MCLR/V
RB6/ICSPCLK/
ICDCK/SEG14
RB7/ICSPDATA/
ICDDAT/SEG13
DD
SS
PIC16F91X
PP