PIC16F639-I/SS Microchip Technology, PIC16F639-I/SS Datasheet - Page 54

• Manufacturer Part Number: PIC16F639-I/SS
• Description: IC MCU FLASH 2KX14 20SSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F639-I/SS

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 20-SSOP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LVD, POR, WDT
• Number Of I /o: 11
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT20SS1-1 - SOCKET TRANSITION 20DIP 20SSOPXLT20SS-1 - SOCKET TRANSITION 18DIP 20SSOPAC162066 - HEADER INTRFC MPLAB ICD2 20PINAC164307 - MODULE SKT FOR PM3 28SSOP
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC12F635/PIC16F636/639
4.2.4
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, refer to the appropriate section
in this data sheet.
FIGURE 4-1:
DS41232D-page 52
Note 1:
PIN DESCRIPTIONS AND
DIAGRAMS
Data Bus
WPUDA
WPUDA
PORTA
PORTA
TRISA
TRISA
IOCA
IOCA
WDA
WDA
Interrupt-on-
WR
WR
WR
WR
WR
RD
RD
RD
RD
RD
Change
Comparator mode determines Analog Input mode.
BLOCK DIAGRAM OF RA0
D
D
D
D
D
CK
CK
CK
CK
CK
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
Analog
RAPU
(1)
RD PORTA
Input Mode
Analog
Q
Q
4.2.4.1
Figure 4-2 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 to the comparator
• In-Circuit Serial Programming™ data
• an analog input for the Ultra Low-Power Wake-up
(1)
EN
EN
D
D
0
1
V
Q1
Weak
Weak
DD
RA0/C1IN+/ICSPDAT/ULPWU
–
+
ULPWUE
V
SS
I
ULP
© 2007 Microchip Technology Inc.
V
T
V
V
DD
SS
I/O pin