PIC16F747 Microchip Technology Inc., PIC16F747 Datasheet - Page 57

• Manufacturer Part Number: PIC16F747
• Description: 28/40/44-pin, 8-bit Cmos Flash Microcontrollers With 10-bit A/d And Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

TABLE 5-1:
TABLE 5-2:
 2004 Microchip Technology Inc.
RA0/AN0
RA1/AN1
RA2/AN2/V
RA3/AN3/V
RA4/T0CKI/C1OUT
RA5/AN4/LVDIN/SS/C2OUT
OSC2/CLKO/RA6
OSC1/CLKI/RA7
Legend: TTL = TTL input, ST = Schmitt Trigger input
Note 1:
05h
85h
9Fh
9Ch
9Dh
Legend:
Address
Note:
PORTA
TRISA
ADCON1
CMCON
CVRCON CVREN CVROE
This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise.
x = unknown, u = unchanged, — = unimplemented locations read as ‘0’. Shaded cells are not used by PORTA.
When using the SSP module in SPI Slave mode and SS enabled, the A/D converter must be set to one of
the following modes, where PCFG2:PCFG0 = 100, 101, 11x.
Name
REF
REF
Name
-/CV
+
PORTA FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
REF
PORTA Data Direction Register
C2OUT
ADFM
Bit 7
RA7
ADCS2 VCFG1 VCFG0 PCFG3 PCFG2
C1OUT
Bit 6
RA6
Bit#
bit 2
bit 3
bit 5
bit 0
bit 1
bit 4
bit 6
bit 7
ST/CMOS
C2INV
CVRR
Bit 5
RA5
Buffer
TTL
TTL
TTL
TTL
TTL
ST
ST
C1INV
Bit 4
(1)
RA4
—
Input/output or analog input.
Input/output or analog input.
Input/output or analog input or V
Input/output or analog input or V
Input/output or external clock input for Timer0. Output is
open-drain type.
Input/output or slave select input for synchronous serial port or
analog input.
Input/output, connects to crystal or resonator, oscillator output or
1/4 the frequency of OSC1 and denotes the instruction cycle in
RC mode.
Input/output, connects to crystal or resonator or oscillator input.
CVR3
Bit 3
RA3
CIS
CVR2
Bit 2
CM2
RA2
PCFG1
CVR1
Bit 1
CM1
RA1
Function
PCFG0 0000 0000
CVR0
Bit 0
CM0
RA0
REF-
REF+.
PIC16F7X7
.
xx0x 0000
1111 1111
0000 0111
000- 0000
POR, BOR
Value on:
DS30498C-page 55
uu0u 0000
1111 1111
0000 0000
0000 0111
000- 0000
Value on
all other
Resets