4.7.1 CONFIG1

Oscillators

Name:	CONFIG1
Address:	0x8007

Configuration Word 1


Bit	15	14	13	12	11	10	9	8
			FCMEN		CSWEN			CLKOUTEN
Access			R/P	U	R/P	U	U	R/P
Reset			1	1	1	1	1	1


Bit	7	6	5	4	3	2	1	0
		RSTOSC[2:0]				FEXTOSC[2:0]
Access	U	R/P	R/P	R/P	U	R/P	R/P	R/P
Reset	1	1	1	1	1	1	1	1

Bit 13 – FCMEN Fail-Safe Clock Monitor Enable bit

Value	Description
`1`	FSCM timer enabled
`0`	FSCM timer disabled

Bit 11 – CSWEN Clock Switch Enable bit

Value	Description
`1`	Writing to NOSC and NDIV is allowed
`0`	The NOSC and NDIV bits cannot be changed by user software

Bit 8 – CLKOUTEN Clock Out Enable bit

Value	Name	Description
`1`	If FEXTOSC = EC (high, mid or low) or Not Enabled	CLKOUT function is disabled; I/O or oscillator function on OSC2
`0`	If FEXTOSC = EC (high, mid or low) or Not Enabled	CLKOUT function is enabled; F_OSC/4 clock appears at OSC2
	Otherwise	This bit is ignored.

Bits 6:4 – RSTOSC[2:0] Power-up Default Value for COSC bits

This value is the Reset default value for COSC and selects the oscillator first used by user software. Refer to COSC operation.

Value	Description
`111`	EXTOSC operating per FEXTOSC bits
`110`	HFINTOSC (1 MHz), with OSCFRQ = ‘`010`’ (4 MHz) and CDIV = ‘`0010`’ (4:1)
`101`	LFINTOSC
`100`	SOSC
`011`	Reserved
`010`	EXTOSC with 4x PLL, with EXTOSC operating per FEXTOSC bits
`001`	HFINTOSC with 2x PLL (32 MHz), with OSCFRQ = ‘`101`’ (16 MHz) and CDIV = ‘`0000`’ (1:1)
`000`	HFINTOSC with OSCFRQ = 32 MHz and CDIV = 1:1

Bits 2:0 – FEXTOSC[2:0] FEXTOSC External Oscillator Mode Selection bits

Value	Description
`111`	ECH (External Clock) above 8 MHz
`110`	ECM (External Clock) for 500 kHz to 8 MHz
`101`	ECL (External Clock) below 500 kHz
`100`	Oscillator not enabled
`011`	Reserved (do not use)
`010`	HS (Crystal oscillator) above 4 MHz
`001`	XT (Crystal oscillator) above 100 kHz, below 4 MHz
`000`	LP (Crystal oscillator) optimized for 32.768 kHz

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