PIC16F684-I/SL Microchip Technology Inc., PIC16F684-I/SL Datasheet - Page 37

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

Specifications of PIC16F684-I/SL

• 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 SOIC-N
• 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

4.2.5
Each PORTA pin is multiplexed with other functions.
The pins and their combined functions are briefly
described here. For specific information about
individual functions such as the Comparator or the
ADC, refer to the appropriate section in this data sheet.
4.2.5.1
Figure 4-1 shows the diagram for this pin. The RA0 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input for the ADC
• an analog non-inverting input to the comparator
• In-Circuit Serial Programming data
• an analog input for the Ultra Low-Power Wake-Up
FIGURE 4-1:
© 2006 Microchip Technology Inc.
PIN DESCRIPTIONS AND
DIAGRAMS
RA0/AN0/C1IN+/ICSPDAT/ULPWU
Data Bus
WPUA
PORTA
WPUA
PORTA
TRISA
Note 1:
TRISA
WR
IOCA
IOCA
Interrupt-on-
RD
WR
WR
WR
RD
RD
RD
BLOCK DIAGRAM OF RA0
Change
D
D
D
D
Comparator mode and ANSEL determines Analog Input mode.
CK
CK
CK
CK
Q
Q
Q
Q
Q
Q
Q
Q
To A/D Converter
To Comparator
RD PORTA
Input Mode
Analog
Q
Q
(1)
Input Mode
Analog
EN
EN
4.2.5.2
Figure 4-2 shows the diagram for this pin. The RA1 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input for the ADC
• an analog inverting input to the comparator
• a voltage reference input for the ADC
• In-Circuit Serial Programming clock
D
D
0
(1)
RAPU
1
Q3
+
-
RA1/AN1/C1IN-/V
ULPWUE
V
Weak
DD
I
ULP
V
SS
V
PIC16F684
T
V
V
REF
DD
SS
DS41202D-page 35
/ICSPCLK
I/O Pin