PIC16F690-E/P Microchip Technology Inc., PIC16F690-E/P Datasheet - Page 69

• Manufacturer Part Number: PIC16F690-E/P
• Description: 20 PIN, 7 KB FLASH, 256 RAM, 18 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F690-E/P

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 7 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 18
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 20-pin PDIP
• Programmable Memory: 7K Bytes
• Ram Size: 256 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

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 TMR1 clock input
• a crystal/resonator connection
• a clock input
FIGURE 4-6:
© 2006 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)
Preliminary
to
DS41262C-page 67