PIC16F687-E/SO Microchip Technology, PIC16F687-E/SO Datasheet - Page 69

• Manufacturer Part Number: PIC16F687-E/SO
• Description: IC PIC MCU FLASH 2KX14 20SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F687-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 18
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-SOIC (7.5mm Width)
• For Use With: XLT20SO1-1 - SOCKET TRANS ICE 20DIP TO 20SOICAC162061 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.2.5.6
Figure 4-6 shows the diagram for this pin. The
RA5/T1CKI/OSC1/CLKIN
function as one of the following:
• a general purpose I/O
• a Timer1 clock input
• a crystal/resonator connection
• a clock input
FIGURE 4-6:
© 2008 Microchip Technology Inc.
Data Bus
PORTA
PORTA
WPUA
WPUA
TRISA
TRISA
IOCA
IOCA
WR
WR
WR
WR
RD
RD
RD
RD
Interrupt-on-
Change
Note
D
D
D
D
To TMR1 or CLKGEN
CK
CK
CK
CK
1: Timer1 LP Oscillator enabled.
2: When using Timer1 with LP oscillator, the
RA5/T1CKI/OSC1/CLKIN
Schmitt Trigger is bypassed.
Q
Q
Q
Q
Q
Q
Q
Q
BLOCK DIAGRAM OF RA5
INTOSC
OSC2
Mode
pin
INTOSC
RABPU
RD PORTA
Mode
Oscillator
Circuit
TMR1LPEN
Q
Q
is
PIC16F631/677/685/687/689/690
EN
EN
configurable
D
D
V
(1)
DD
Weak
V
V
DD
Q3
SS
I/O Pin
(2)
to
DS41262E-page 67