PIC16F684-I/P Microchip Technology Inc., PIC16F684-I/P Datasheet - Page 38

• Manufacturer Part Number: PIC16F684-I/P
• Description: 14 PIN, 3.5 KB FLASH, 128 RAM, 12 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F684-I/P

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 12
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 14-pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 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

PIC16F684
FIGURE 4-2:
DS41202D-page 36
Data Bus
PORTA
PORTA
WPUA
WPUA
TRISA
TRISA
IOCA
IOCA
Interrupt-on-
Note 1:
WR
WR
WR
WR
RD
RD
RD
RD
Change
D
D
D
D
To Comparator
To A/D Converter
CK
CK
CK
CK
Comparator mode and ANSEL determines Analog
Input mode.
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
BLOCK DIAGRAM OF RA1
Analog
RD PORTA
Input Mode
(1)
RAPU
Analog
Q
Q
(1)
EN
EN
D
D
V
DD
Weak
V
V
Q3
DD
SS
I/O Pin
4.2.5.3
Figure 4-3 shows the diagram for this pin. The RA2 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input for the ADC
• the clock input for TMR0
• an external edge triggered interrupt
• a digital output from Comparator 1
FIGURE 4-3:
Data Bus
PORTA
PORTA
WPUA
WPUA
TRISA
TRISA
IOCA
IOCA
Interrupt-on-
WR
WR
WR
WR
RD
RD
RD
RD
Note 1:
Change
D
D
D
D
To Timer0
To INT
To A/D Converter
CK
CK
CK
CK
Analog Input mode is generated by ANSEL.
RA2/AN2/T0CKI/INT/C1OUT
Q
Q
Q
Q
Q
Q
Q
Q
BLOCK DIAGRAM OF RA2
Input Mode
Analog
© 2006 Microchip Technology Inc.
C1OUT
Enable
C1OUT
(1)
Input Mode
RAPU
RD PORTA
Analog
1
0
Q
Q
(1)
EN
EN
D
D
V
DD
Weak
V
V
DD
Q3
SS
I/O Pin