TUxyCON1

Timer Control Register 1

Notes:

1.Clock synchronization delays apply.
2.This bit is held at zero if a Start has occurred (the counter is “running”), but ERS is holding the counter at the value zero when RESET = ‘b01 (level-triggered).
3.The clearing of the ON bit in One Shot mode is subject to clock synchronization delays. Refer to sections Synchronous vs. Asynchronous Operation and One Shot Mode for details.
4.This bit is not clock synchronized, and needs to only be changed while ON = 0.
5.This bit is subject to clock synchronization delays. See Timer Counter and Capture Registers for details.
6.If the counter is disabled (ON = 0) or if the module is frozen during debugging, then the timer clock has been disabled; the effect of setting CLR or CAPT command bits depends on the clock synchronization setting. If CSYNC = 0, the corresponding action is performed immediately. If CSYNC = 1, the corresponding action is delayed until the clock resumes (even in Frozen state while debugging). See also Timer Counter and Capture Registers.
7.A capture event can also be triggered by other means. See Timer Counter and Capture Registers for details.
8. If the CAPT command is near-coincident with a Stop event, the captured value may represent the first event that occurs.
9.The captured value is read by setting RDSEL = 0 and reading TUxyCR.
10.This bit may be set by software to invoke an interrupt or DMA operation.
11.The interrupt flags will be set even if the corresponding interrupt is disabled.
12.The PRIF interrupt will not occur if the user writes the PR value to the TUxyTMR counter register directly.
13.The CIF interrupt trigger requires a running timer.
14.This register is not available when the module is chained and operated as a Secondary module.

8

Timer Run/Stop Status (Read-Only)^(1,2)

Value	Description
1	Timer is running (counting) and not being held in Reset by ERS (per EPOL bit selection)
0	Timer is not counting or is held in Reset by ERS

One Shot Mode Enable^(3,4)

Value	Description
1	The counter operates in One Shot mode; ON will be cleared by a Stop condition
0	The counter can be repeatedly started by the ERS signal

Timer Counter “Clear” Command^(5,6)

Writing this bit with ‘0’ has no effect.

Value	Description
1	Once set, the timer counter and the internal prescaler counter are cleared, then this bit is cleared (the captured value of TUxyCR is unchanged)
0	Clearing action is complete (or not started)

Limit Mode Enable⁽⁴⁾

This bit is relevant when RESET = ‘b00 (Continuous mode) and counter equals PR.

Value	Description
1	Counter value remains equal to PR (unchanged); no additional interrupts occur
0	Counter value goes tor PR+1 when clocked

Timer “Capture” Command^(5,6,7,8,9)

Writing this bit with ‘0’ has no effect.

Value	Description
1	Once set, the counter value is captured in TUxyCR and this bit is cleared
0	TUxyCR update is complete (or not started)

Period Match Interrupt Flag^(10,11,12)

Value	Description
1	The counter has incremented from PR-1 to PR
0	The counter has not incremented from PR-1 to PR since this bit was last cleared

Zero Interrupt Flag^(10,11)

Value	Description
1	The counter has reset or rolled over to zero
0	The counter has not reset or rolled over since this bit was last cleared

Capture Interrupt Flag^(10,11,13)

Value	Description
1	A capture event has occurred
0	A capture event has not occurred since this bit was last cleared

Bit	7	6	5	4	3	2	1	0
	RUN	OSEN	CLR	LIMIT	CAPT	PRIF	ZIF	CIF
Access	R	R/W	R/S/HC	R/W	R/S/HC	R/W/HS	R/W/HS	R/W/HS
Reset	0	0	0	0	0	0	0	0

TUxyCON1

TUxyCON1

Bit 7 – RUN: Timer Run/Stop Status (Read-Only)(1,2)

Bit 6 – OSEN: One Shot Mode Enable(3,4)

Bit 5 – CLR: Timer Counter “Clear” Command(5,6)

Bit 4 – LIMIT: Limit Mode Enable(4)

Bit 3 – CAPT: Timer “Capture” Command(5,6,7,8,9)

Bit 2 – PRIF: Period Match Interrupt Flag(10,11,12)

Bit 1 – ZIF: Zero Interrupt Flag(10,11)

Bit 0 – CIF: Capture Interrupt Flag(10,11,13)