PIC16F690-E/P Microchip Technology Inc., PIC16F690-E/P Datasheet - Page 67

• 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

4.2.5.2
Figure 4-2 shows the diagram for this pin. The
RA1/AN1/C12IN0-/V
function as one of the following:
• a general purpose I/O
• an analog input for the ADC (except PIC16F631)
• an analog input to Comparator C1 or C2
• a voltage reference input for the ADC
• In-Circuit Serial Programming clock
FIGURE 4-2:
© 2006 Microchip Technology Inc.
Data Bus
PORTA
PORTA
WPUA
WPUA
TRISA
TRISA
IOCA
IOCA
Interrupt-on-
Note 1:
WR
WR
WR
WR
RD
RD
RD
RD
Change
2:
D
D
D
D
To Comparator
CK
CK
CK
CK
To A/D Converter
ANSEL determines Analog Input mode.
Not implemented on PIC16F631.
RA1/AN1/C12IN0-/V
Q
Q
Q
Q
Q
Q
Q
Q
REF
Input Mode
BLOCK DIAGRAM OF RA1
Analog
RD PORTA
/ICSPCLK pin is configurable to
(2)
Input Mode
(1)
RABPU
Analog
Q
Q
(1)
EN
EN
PIC16F631/677/685/687/689/690
REF
D
D
V
/ICSPCLK
DD
Weak
V
V
DD
Q3
SS
I/O Pin
Preliminary
4.2.5.3
Figure 4-3 shows the diagram for this pin. The
RA2/AN2/T0CKI/INT/C1OUT pin is configurable to
function as one of the following:
• a general purpose I/O
• an analog input for the ADC (except PIC16F631)
• the clock input for TMR0
• an external edge triggered interrupt
• a digital output from Comparator C1
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
2:
D
D
D
D
To TMR0
To INT
To A/D Converter
CK
CK
CK
CK
ANSEL determines Analog Input mode.
Not implemented on PIC16F631.
RA2/AN2/T0CKI/INT/C1OUT
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
BLOCK DIAGRAM OF RA2
Analog
C1OUT
(2)
C1OUT
Enable
(1)
Input Mode
RABPU
RD PORTA
Analog
1
0
Q
Q
(1)
EN
EN
DS41262C-page 65
D
D
V
DD
Weak
V
V
Q3
DD
SS
I/O Pin