10.6.3 Peripheral Channel Control n

PCHTRL[n] controls the settings of Peripheral Channel n.

Name:	PCHCTRL[n]
Offset:	0x80 + n*0x04 [n=0..12]
Reset:	0x00000000
Property:	PAC Write-Protection


Bit	31	30	29	28	27	26	25	24

Access
Reset


Bit	23	22	21	20	19	18	17	16

Access
Reset


Bit	15	14	13	12	11	10	9	8

Access
Reset


Bit	7	6	5	4	3	2	1	0
	WRTLOCK	CHEN			GEN[3:0]
Access	R/W	R/W			R/W	R/W	R/W	R/W
Reset	0	0			0	0	0	0

Bit 7 – WRTLOCK Write Lock

Writing a ‘0’ to this bit will set the Peripheral Channel register (PCHCTRL[n]) and the associated Generator register (GENCTRL[n]) to an unlocked state.

Writing a '1' to this bit will cause future writes to the PCHCTRL[n] register to be discarded. The control register of the corresponding Generator m (GENCTRL[m]), as assigned by the Generator Select (GEN) bit field of the Peripheral Control (PCHCTRL[n]) register, will also be locked. It can only be unlocked by a Device Reset.

Note: Generator 0 (GENCTRL[0]) cannot be locked.

Value	Description
0	The Peripheral Channel register and the associated Generator register are not locked
1	The Peripheral Channel register and the associated Generator register are locked

Bit 6 – CHEN Channel Enable

This bit is used to enable and disable a Peripheral Channel.

Note: This bit requires synchronization. When writing to this bit, its value must be polled (read back and checked against ' expected value) to ensurethat synchronization is complete.

Value	Description
0	The Peripheral Channel is disabled
1	The Peripheral Channel is enabled

Bits 3:0 – GEN[3:0] Generator Selection

This bit field selects the Generator to be used as clock source of a peripheral.

A Device Reset will reset all the PCHCTRL[n] registers.

Note: Refer to the Peripheral Clocks section for details on the peripheral channels and their corresponding peripheral instances available on the device (PCHCTRL[n] mapping).

Value	Name	Description
0x0	GCLK0	Generic Clock Generator 0
0x1	GCLK1	Generic Clock Generator 1
0x2	GCLK2	Generic Clock Generator 2
0x3	GCLK3	Generic Clock Generator 3