16f628 CPU configuration

Each attribute in the configuration table below has two or more possible values associated with it.
e.g. the watchdog attribute (labelled field F ) has the possible values

CFG_WDT_ON

CFG_WDT_OFF

one and only one of these values must be specified when configuring the CPU
The 16f628 CPU has 8 configuration attributes (labelled field A to H in the table below). The attributes specific to the 16f628 CPU are defined in the file hwreg-p16f628.h To correctly configure the 16f628 CPU each attribute must be set to a valid value. This is done by using one "pragma cpu_config" statement per attribute. A valid configuration for 16f628 would look like:
e.g.
	include "hwreg-p16f628.h"

	pragma cpu_config CFG_CP_ALL
	pragma cpu_config CFG_DATA_CP_ON
	pragma cpu_config CFG_BODEN_ON
	pragma cpu_config CFG_MCLRE_ON
	pragma cpu_config CFG_PWRTE_ON
	pragma cpu_config CFG_WDT_ON
	pragma cpu_config CFG_LVP_ON
	pragma cpu_config CFG_ER_OSC_CLKOUT
NOTE: All attributes for a given processor must be specified, attributes for different processors may not be mixed.

Field Attribute XCSB value Description

A Program Memory Code Protect CFG_CP_ALL code protect all program memory

CFG_CP_75 code protect top 75% of program memory

CFG_CP_50 code protect top 50% of program memory

CFG_CP_OFF do not code protect any program memory

B Data Memory Code Protected CFG_DATA_CP_ON data memory is code protected

CFG_DATA_CP_OFF data memory is NOT code protected

C Brown-Out Detect CFG_BODEN_ON Brown-Out Detect enabled

CFG_BODEN_OFF Brown-Out Detect disabled

D RA5/MCLR pin function select CFG_MCLRE_ON RA5/MCLR pin is MCLR function

CFG_MCLRE_OFF RA5/MCLR pin is digital I/O function
(MCLR is internally tied to VDD)

E Power-Up Timer CFG_PWRTE_ON power-up timer enable

CFG_PWRTE_OFF power-up timer disable

F Watchdog timer CFG_WDT_ON watchdog timer enable

CFG_WDT_OFF watchdog timer disable

G Low Voltage In-Circuit Programming CFG_LVP_ON Low Voltage in-circuit serial Programming enabled
RB4/PGM pin has PGM function

CFG_LVP_OFF Low Voltage in-circuit serial Programming disabled
RB4/PGM pin has digital I/O function
(high voltage must be present on MCLR pin for programming)

H Oscillator CFG_ER_OSC_CLKOUT External Resistor (ER) oscillator
with clock output
RA6/OSC2/CLKOUT pin is CLKOUT function
resister on RA7/OSC1/CLKIN pin

CFG_ER_OSC_NOCLKOUT External Resistor (ER) oscillator
without clock output
RA6/OSC2/CLKOUT pin is I/O function
resister on RA7/OSC1/CLKIN pin

CFG_INTRC_OSC_CLKOUT Internal Resistor / Capacitor (INTRC) oscillator
with clock output
RA6/OSC2/CLKOUT pin is CLKOUT function
RA7/OSC1/CLKIN pin is I/O function

CFG_INTRC_OSC_NOCLKOUT Internal Resistor / Capacitor (INTRC) oscillator
without clock output
RA6/OSC2/CLKOUT pin is I/O function
RA7/OSC1/CLKIN pin is I/O function

CFG_EXTCLK_OSC External Clock (EC)
RA6/OSC2/CLKOUT pin is I/O function
RA7/OSC1/CLKIN pin is CLKIN function

CFG_HS_OSC High Speed Crystal / Resonator (HS) oscillator

CFG_XT_OSC Crystal / Resonator (XT) oscillator

CFG_LP_OSC Low Power Crystal (LP) oscillator

Field	Attribute	XCSB value	Description
A	Program Memory Code Protect	CFG_CP_ALL	code protect all program memory
		CFG_CP_75	code protect top 75% of program memory
		CFG_CP_50	code protect top 50% of program memory
		CFG_CP_OFF	do not code protect any program memory
B	Data Memory Code Protected	CFG_DATA_CP_ON	data memory is code protected
B	Data Memory Code Protected	CFG_DATA_CP_OFF	data memory is NOT code protected
C	Brown-Out Detect	CFG_BODEN_ON	Brown-Out Detect enabled
C	Brown-Out Detect	CFG_BODEN_OFF	Brown-Out Detect disabled
D	RA5/MCLR pin function select	CFG_MCLRE_ON	RA5/MCLR pin is MCLR function
D	RA5/MCLR pin function select	CFG_MCLRE_OFF	RA5/MCLR pin is digital I/O function (MCLR is internally tied to VDD)
E	Power-Up Timer	CFG_PWRTE_ON	power-up timer enable
E	Power-Up Timer	CFG_PWRTE_OFF	power-up timer disable
F	Watchdog timer	CFG_WDT_ON	watchdog timer enable
F	Watchdog timer	CFG_WDT_OFF	watchdog timer disable
G	Low Voltage In-Circuit Programming	CFG_LVP_ON	Low Voltage in-circuit serial Programming enabled RB4/PGM pin has PGM function
G	Low Voltage In-Circuit Programming	CFG_LVP_OFF	Low Voltage in-circuit serial Programming disabled RB4/PGM pin has digital I/O function (high voltage must be present on MCLR pin for programming)
H	Oscillator	CFG_ER_OSC_CLKOUT	External Resistor (ER) oscillator with clock output RA6/OSC2/CLKOUT pin is CLKOUT function resister on RA7/OSC1/CLKIN pin
		CFG_ER_OSC_NOCLKOUT	External Resistor (ER) oscillator without clock output RA6/OSC2/CLKOUT pin is I/O function resister on RA7/OSC1/CLKIN pin
		CFG_INTRC_OSC_CLKOUT	Internal Resistor / Capacitor (INTRC) oscillator with clock output RA6/OSC2/CLKOUT pin is CLKOUT function RA7/OSC1/CLKIN pin is I/O function
		CFG_INTRC_OSC_NOCLKOUT	Internal Resistor / Capacitor (INTRC) oscillator without clock output RA6/OSC2/CLKOUT pin is I/O function RA7/OSC1/CLKIN pin is I/O function
		CFG_EXTCLK_OSC	External Clock (EC) RA6/OSC2/CLKOUT pin is I/O function RA7/OSC1/CLKIN pin is CLKIN function
		CFG_HS_OSC	High Speed Crystal / Resonator (HS) oscillator
		CFG_XT_OSC	Crystal / Resonator (XT) oscillator
		CFG_LP_OSC	Low Power Crystal (LP) oscillator