PIC16F688-I/SL Microchip Technology, PIC16F688-I/SL Datasheet - Page 105

• 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

11.4
The on-chip POR circuit holds the chip in Reset until
V
operation. To take advantage of the POR, simply
connect the MCLR pin through a resistor to V
will eliminate external RC components usually needed
to create Power-on Reset. A maximum rise time for
V
cations” for details. If the BOD is enabled, the maxi-
mum rise time specification does not apply. The BOD
circuitry will keep the device in Reset until V
V
(BOD)”).
When the device starts normal operation (exits the
Reset condition), device operating parameters (i.e.,
voltage, frequency, temperature, etc.) must be met to
ensure operation. If these conditions are not met, the
device must be held in Reset until the operating
conditions are met.
For additional information, refer to Application Note
AN607, “Power-up Trouble Shooting” (DS00607).
11.4.1
PIC16F688 has a noise filter in the MCLR Reset path.
The filter will detect and ignore small pulses.
It should be noted that a WDT Reset does not drive
MCLR pin low.
The behavior of the ESD protection on the MCLR pin
has been altered from early devices of this family.
Voltages applied to the pin that exceed its specification
can result in both MCLR Resets and excessive current
beyond the device specification during the ESD event.
For this reason, Microchip recommends that the MCLR
pin no longer be tied directly to V
network, as shown in Figure 11-2, is suggested.
An internal MCLR option is enabled by clearing the
MCLRE bit in the Configuration Word register. When
cleared, MCLR is internally tied to V
weak pull-up is enabled for the MCLR pin. In-Circuit
Serial Programming is not affected by selecting the
internal MCLR option.
 2004 Microchip Technology Inc.
DD
DD
BOD
Note:
is required. See Section 14.0 “Electrical Specifi-
has reached a high enough level for proper
(see
Power-On Reset
The POR circuit does not produce an
internal Reset when V
re-enable the POR, V
for a minimum of 100 s.
MCLR
Section 11.4.4
“Brown-Out
DD
DD
. The use of an RC
DD
DD
must reach Vss
and an internal
declines. To
DD
DD
reaches
Detect
. This
Preliminary
FIGURE 11-2:
11.4.2
The on-chip POR circuit holds the chip in Reset until
V
operation. To take advantage of the POR, simply
connect the MCLR pin through a resistor to V
will eliminate external RC components usually needed
to create Power-on Reset. A maximum rise time for
V
cations” for details. If the BOD is enabled, the
maximum rise time specification does not apply. The
BOD circuitry will keep the device in Reset until V
reaches V
Detect (BOD)”).
When the device starts normal operation (exits the
Reset condition), device operating parameters (i.e.,
voltage, frequency, temperature, etc.) must be met to
ensure operation. If these conditions are not met, the
device must be held in Reset until the operating
conditions are met.
For additional information, refer to Application Note
AN607, “Power-up Trouble Shooting” (DS00607).
DD
DD
Note:
is required. See Section 14.0 “Electrical Specifi-
has reached a high enough level for proper
V
DD
R1
1 k
BOD
POWER-ON RESET (POR)
The POR circuit does not produce an
internal Reset when V
re-enable the POR, V
for a minimum of 100 s.
C1
0.1 F
(optional, not critical)
or greater)
(see Section 11.4.4 “Brown-Out
RECOMMENDED
CIRCUIT
PIC16F688
MCLR
DD
DS41203B-page 103
PIC16F688
DD
must reach Vss
declines. To
MCLR
DD
. This
DD