PIC16F688-I/SL Microchip Technology, PIC16F688-I/SL Datasheet - Page 106

• Manufacturer Part Number: PIC16F688-I/SL
• Description: IC PIC MCU FLASH 4KX14 14SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F688-I/SL

• Program Memory Type: FLASH
• Program Memory Size: 7KB (4K x 14)
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 12
• 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: SCI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 1
• 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, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT14SO-1 - SOCKET TRANSITION 14SOIC 150/208AC162061 - HEADER INTRFC MPLAB ICD2 20PINAC162056 - HEADER INTERFACE ICD2 16F688
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC16F688
11.4.3
The Power-up Timer provides a fixed 64 ms (nominal)
time-out on power-up only, from POR or Brown-out
Detect. The Power-up Timer operates from the 31 kHz
LFINTOSC oscillator. For more information, see
Section 3.4 “Internal Clock Modes”. The chip is kept
in Reset as long as PWRT is active. The PWRT delay
allows the V
uration bit, PWRTE, can disable (if set) or enable (if
cleared or programmed) the Power-up Timer. The
Power-up Timer should be enabled when Brown-out
Detect is enabled, although it is not required.
The Power-up Timer delay will vary from chip-to-chip
and vary due to:
• V
• Temperature variation
• Process variation
See
“Electrical Specifications”).
11.4.4
The BODEN0 and BODEN1 bits in the Configuration
Word register selects one of four BOD modes. Two
modes have been added to allow software or hardware
control of the BOD enable. When BODEN<1:0> = 01,
the SBODEN bit (PCON<4>) enables/disables the
BOD allowing it to be controlled in software. By select-
ing BODEN<1:0>, the BOD is automatically disabled in
Sleep to conserve power and enabled on wake-up. In
this mode, the SBODEN bit is disabled. See
Register 11-1 for the configuration word definition.
FIGURE 11-3:
DS41203B-page 104
DD
DC
variation
Note 1: 64 ms delay only if PWRTE bit is programmed to ‘0’.
POWER-UP TIMER (PWRT)
BROWN-OUT DETECT (BOD)
DD
parameters
Internal
Internal
Internal
to rise to an acceptable level. A config-
Reset
Reset
Reset
V
V
V
DD
DD
DD
BROWN-OUT SITUATIONS
for
details
(Section 14.0
Preliminary
< 64 ms
64 ms
If V
(T
tions”), the Brown-out situation will reset the device.
This will occur regardless of V
not insured to occur if V
than parameter (T
On any Reset (Power-on, Brown-out Detect, Watchdog
Timer, etc.), the chip will remain in Reset until V
above V
will now be invoked, if enabled and will keep the chip in
Reset an additional 64 ms.
If V
running, the chip will go back into a Brown-out Detect
and the Power-up Timer will be re-initialized. Once V
rises above V
64 ms Reset.
11.4.5
The PIC16F688 stores the BOD calibration values in
fuses located in the Calibration Word (2008h). The
Calibration Word is not erased when using the speci-
fied bulk erase sequence in the PIC12F6XX/16F6XX
Memory Programming Specification (DS41204) and
thus, does not require reprogramming.
(1)
BOD
Note:
Note:
64 ms
64 ms
DD
DD
) (see Section 14.0 “Electrical Specifica-
drops below V
falls below V
(1)
BOD
(1)
The Power-up Timer is enabled by the
PWRTE bit in the Configuration Word.
BOD CALIBRATION
memory space. It belongs to the special
configuration
3FFFh), which can be accessed only during
programming. See PIC12F6XX/16F6XX
Memory
(DS41204) for more information.
Address 2008h is beyond the user program
(see Figure 11-3). The Power-up Timer
BOD
BOD
, the Power-up Timer will execute a
BOD
BOD
).
Programming
 2004 Microchip Technology Inc.
DD
while the Power-up Timer is
for greater than parameter
memory
V
V
V
falls below V
BOD
BOD
BOD
DD
slew rate. A Reset is
space
Specification
BOD
(2000h-
DD
for less
rises
DD