PIC16F627-04 Microchip Technology, PIC16F627-04 Datasheet - Page 33

• Manufacturer Part Number: PIC16F627-04
• Description: FLASH-Based 8-Bit CMOS Microcontrollers
• Manufacturer: Microchip Technology

TABLE 5-1:
TABLE 5-2:
RA0/AN0
RA1/AN1
RA2/AN2/V
RA3/AN3
RA4/T0CKI
RA5/MCLR/THV
RA6/OSC2/CLK-
OUT
RA7/OSC1/CLKIN
Legend: ST = Schmitt Trigger input
Address Name
05h
85h
1Fh
9Fh
Legend: — = Unimplemented locations, read as ‘0’, u = unchanged, x = unknown
Note:
1999 Microchip Technology Inc.
Name
Shaded bits are not used by PORTA.
PORTA
TRISA
CMCON
VRCON
REF
PORTA FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
TRISA7
C2OUT
VREN
Bit 7
RA7
Bit #
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
TRISA6
C1OUT
VROE
Bit 6
RA6
Buffer
Type
ST
ST
ST
ST
ST
ST
ST
ST
C2INV
Bit 5
VRR
RA5
—
Bi-directional I/O port/comparator input
Bi-directional I/O port/comparator input
Bi-directional I/O port/analog/comparator input or V
Bi-directional I/O port/analog/comparator input/comparator output
Bi-directional I/O port/external clock input for TMR0 or comparator output.
Output is open drain type.
Input port/master clear (reset input/programming voltage input. When
configured as MCLR, this pin is an active low reset to the device. Voltage
on MCLR/THV must not exceed V
Bi-directional I/O port/Oscillator crystal output. Connects to crystal or res-
onator in crystal oscillator mode. In ER mode, OSC2 pin outputs CLKOUT
which has 1/4 the frequency of OSC1, and denotes the instruction cycle
rate.
Bi-directional I/O port/oscillator crystal input/external clock source input.
TRISA4
C1INV
Bit 4
RA4
—
Preliminary
TRISA3
Bit 3
RA3
VR3
CIS
TRISA2
Bit 2
CM2
RA2
VR2
TRISA1
Function
Bit 1
RA1
CM1
VR1
DD
during normal device operation.
TRISA0
Bit 0
CM0
RA0
VR0
PIC16F62X
xxxx 0000
11-1 1111
0000 0000
000- 0000
Value on
REF
POR
output
DS40300B-page 33
xxxu 0000
11-1 1111
0000 0000
000- 0000
Value on
All Other
Resets