CONFIG1
| Bit15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| FCMEN | VDDAR | CSWEN | CLKOUTEN | ||||
| Access | R/W | R/W | R/W | R/W | |||
| Reset | 1 | 1 | 1 | 1 | |||
| Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RSTOSC[2:0] | FEXTOSC[2:0] | ||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 1 | 1 | 1 | 1 | 1 | 1 | |
Fail-Safe Clock Monitor Enable
| Value | Description |
|---|---|
| 1 | Fail-Safe Clock Monitor is enabled |
| 0 | Fail-Safe Clock Monitor is disabled |
VDD Analog Range Calibration Selection
| Value | Description |
|---|---|
| 1 | Internal analog systems are calibrated for operation between VDD = 2.3V - 5.5V |
| 0 | Internal analog systems are calibrated for operation between VDD = 1.8V - 3.6V |
Clock Switch Enable
| Value | Description |
|---|---|
| 1 | Writing to NOSC and NDIV is allowed |
| 0 | The NOSC and NDIV bit fields cannot be changed by user software |
Clock Out Enable
| Value | Description |
|---|---|
| 1 | CLKOUT function is disabled; I/O function on CLKOUT pin |
| 0 | CLKOUT function is enabled; FOSC/4 clock appears on CLKOUT pin |
Power-up Default Value for the NOSC/COSC bits
| Value | Description |
|---|---|
| 111 | EXTOSC operating per the FEXTOSC bits |
| 110 | HFINTOSC = 1 MHz (FRQ = 4 MHz, CDIV = 4:1) |
| 101 | LFINTOSC |
| 100 | SOSC |
| 011 | Reserved |
| 010 | EXTOSC with 4x PLL, EXTOSC operating per FEXTOSC bits |
| 001 | HFINTOSC = 16 MHz (FRQ = 16 MHz, CDIV = 1:1) |
| 000 | HFINTOSC = 32 MHz (FRQ = 32 MHz, CDIV = 1:1) |
External Oscillator Mode Selection
| Value | Description |
|---|---|
| 111 | ECH (16 MHz and higher) |
| 110 | Reserved |
| 101 | ECL (below 16 MHz) |
| 100 | Oscillator not enabled |
| 011 | Reserved |
| 010 | HS (crystal oscillator) above 4 MHz |
| 001 | XT (crystal oscillator) between 100 kHz and 4 MHz |
| 000 | LP (crystal oscillator) 32 kHz |