PIC16F785-I/SO Microchip Technology, PIC16F785-I/SO Datasheet - Page 38

• Manufacturer Part Number: PIC16F785-I/SO
• Description: IC PIC MCU FLASH 2KX14 20SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F785-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 20-SOIC (7.5mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 14x10b
• 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: RS- 232/USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 3
• 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, ICE2000, DV164120, DM163029
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT20SO1-1 - SOCKET TRANS ICE 20DIP TO 20SOICXLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILAC162060 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOIC
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC16F785/HV785
REGISTER 4-2:
4.2
Every PORTA pin on the PIC16F785/HV785 has an
interrupt-on-change option and a weak pull-up option.
The next three sections describe these functions.
REGISTER 4-3:
DS41249E-page 36
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-6
bit 5-0
bit 0
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-6
bit 5-0
Note 1: TRISA<3> always reads ‘1’.
Note 1: Global RAPU must be enabled for individual pull-ups to be enabled.
U-0
U-0
—
—
2: TRISA<5:4> always reads ‘1’ in XT, HS and LP OSC modes.
2: The weak pull-up device is automatically disabled if the pin is in Output mode
3: The RA3 pull-up is automatically enabled when configured as MCLR in the Configuration Word.
4: WPUA<5:4> always reads ‘1’ in XT, HS and LP OSC modes.
Additional Pin Functions
(TRISA = 0).
Unimplemented: Read as ‘0’
TRISA<5:0>: PORTA Tri-State Control bit
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
C: Carry/Borrow bit (ADDWF, ADDLW, SUBLW, SUBWF instructions)
1 = A carry-out from the Most Significant bit of the result occurred
0 = No carry-out from the Most Significant bit of the result occurred
Unimplemented: Read as ‘0’
WPUA<5:0>: Weak Pull-up Register bits
1 = Pull-up enabled
0 = Pull-up disabled
U-0
U-0
—
—
TRISA: PORTA TRI-STATE REGISTER
WPUA: WEAK PULL-UP REGISTER
W = Writable bit
W = Writable bit
‘1’ = Bit is set
‘1’ = Bit is set
TRISA5
WPUA5
R/W-1
R/W-1
(2)
(4)
WPUA4
TRISA4
R/W-1
R/W-1
(2)
(4)
(1), (2)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
TRISA3
WPUA3
R/W-1
4.2.1
Each of the PORTA pins has an individually configurable
internal weak pull-up. Control bits WPUAx enable or
disable each pull-up. Refer to Register 4-3. Each weak
pull-up is automatically turned off when the port pin is
configured as an output. The pull-ups are disabled on a
Power-on Reset by the RAPU bit in the (OPTION
Register. The weak pull-up on RA3 is automatically
enabled when RA3 is configured as MCLR.
R-1
(1)
(3)
WEAK PULL-UPS
TRISA2
WPUA2
R/W-1
R/W-1
(1)
© 2008 Microchip Technology Inc.
x = Bit is unknown
x = Bit is unknown
WPUA1
TRISA1
R/W-1
R/W-1
TRISA0
WPUA0
R/W-1
R/W-1
bit 0
bit 0