PIC16F688-E/ST Microchip Technology, PIC16F688-E/ST Datasheet - Page 50

• Manufacturer Part Number: PIC16F688-E/ST
• Description: IC MCU FLASH 4KX14 14TSSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F688-E/ST

• Program Memory Type: FLASH
• Program Memory Size: 7KB (4K x 14)
• Package / Case: 14-TSSOP
• 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 ~ 125°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: 2
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 125 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-ch x 10-bit
• Data Rom Size: 256 B
• Height: 0.9 mm
• Length: 5 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2 V
• Width: 4.4 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT14SS-1 - SOCKET TRANSITION 14DIP/14SSOPAC162061 - HEADER INTRFC MPLAB ICD2 20PINAC162056 - HEADER INTERFACE ICD2 16F688
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC16F688
6.0
The Timer1 module is a 16-bit timer/counter with the
following features:
• 16-bit timer/counter register pair (TMR1H:TMR1L)
• Programmable internal or external clock source
• 3-bit prescaler
• Optional LP oscillator
• Synchronous or asynchronous operation
• Timer1 gate (count enable) via comparator or
• Interrupt on overflow
• Wake-up on overflow (external clock,
Figure 6-1 is a block diagram of the Timer1 module.
FIGURE 6-1:
DS41203E-page 48
T1G pin
Asynchronous mode only)
Without CLKOUT
OSC1/T1CKI
OSC2/T1G
CONTROL
TIMER1 MODULE WITH GATE
T1OSCEN
INTOSC
Note 1:
Set flag bit
TMR1IF on
Overflow
2:
3:
TIMER1 BLOCK DIAGRAM
ST Buffer is low power type when using LP oscillator, or high speed type when using T1CKI.
Timer1 register increments on rising edge.
Synchronize does not operate while in Sleep.
Oscillator
TMR1H
TMR1
(2)
TMR1L
EN
(1)
Internal
F
OSC
Clock
/4
6.1
The Timer1 module is a 16-bit incrementing counter
which is accessed through the TMR1H:TMR1L register
pair. Writes to TMR1H or TMR1L directly update the
counter.
When used with an internal clock source, the module is
a timer. When used with an external clock source, the
module can be used as either a timer or counter.
6.2
The TMR1CS bit of the T1CON register is used to select
the clock source. When TMR1CS = 0, the clock source
is F
supplied externally.
TMR1CS
F
T1CKI pin
Clock Source
OSC
1
0
To C2 Comparator Module
Timer1 Clock
OSC
/4
/4. When TMR1CS = 1, the clock source is
Timer1 Operation
Clock Source Selection
T1CKPS<1:0>
T1SYNC
Prescaler
1, 2, 4, 8
TMR1ON
0
1
2
C2OUT
TMR1CS
© 2009 Microchip Technology Inc.
TMR1GE
0
1
Synchronized
Synchronize
clock input
T1GSS
1
0
det
F
T1CKI pin
Clock Source
OSC
(3)
/4
T1GINV