Tim1 Control Register 2 (Tim1_Cr2) - STMicroelectronics STM32F05 series Reference Manual

Advanced-control timers (TIM1)
Bit 2 URS: Update request source
Bit 1 UDIS: Update disable
Bit 0 CEN: Counter enable
Note: External clock, gated mode and encoder mode can work only if the CEN bit has been
15.4.2

TIM1 control register 2 (TIM1_CR2)

Address offset: 0x04
Reset value: 0x0000
15 14 13
Res. OIS4 OIS3N OIS3
rw rw
Bit 15 Reserved, must be kept at reset value.
Bit 14 OIS4: Output Idle state 4 (OC4 output)
refer to OIS1 bit
Bit 13 OIS3N: Output Idle state 3 (OC3N output)
refer to OIS1N bit
Bit 12 OIS3: Output Idle state 3 (OC3 output)
refer to OIS1 bit
Bit 11 OIS2N: Output Idle state 2 (OC2N output)
refer to OIS1N bit
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This bit is set and cleared by software to select the UEV event sources.
0: Any of the following events generate an update interrupt or DMA request if enabled.
These events can be:
– Counter overflow/underflow
– Setting the UG bit
– Update generation through the slave mode controller
1: Only counter overflow/underflow generates an update interrupt or DMA request if
enabled.
This bit is set and cleared by software to enable/disable UEV event generation.
0: UEV enabled. The Update (UEV) event is generated by one of the following events:
– Counter overflow/underflow
– Setting the UG bit
– Update generation through the slave mode controller
Buffered registers are then loaded with their preload values.
1: UEV disabled. The Update event is not generated, shadow registers keep their value
(ARR, PSC, CCRx). However the counter and the prescaler are reinitialized if the UG bit is
set or if a hardware reset is received from the slave mode controller.
0: Counter disabled
1: Counter enabled
previously set by software. However trigger mode can set the CEN bit automatically by
hardware.
12 11 10 9
OIS2N OIS2 OIS1N
rw rw rw rw
Doc ID 018940 Rev 1
8 7 6 5
OIS1 TI1S MMS[2:0]
rw rw rw rw
4 3 2 1
CCDS CCUS Res.
rw rw rw
RM0091
0
CCPC
rw