EM357-RTR datasheet(128/240 Pages) ETC2

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EM357-RTR 数据表(PDF) 128 Page - List of Unclassifed Manufacturers

部件名	EM357-RTR

功能描述	High-Performance, Integrated ZigBee/802.15.4 System-on-Chip

PDF	240 Pages

Scroll/Zoom	100%

制造商	ETC2 [List of Unclassifed Manufacturers]

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128 / 240 page

EM351 / EM357

When a UEV occurs, the update flag (the INT_TIMUIF bit in the INT_TIMxFLAG register) is set (unless TIM_USR

is 1) and the following registers are updated:

The prescaler shadow register is reloaded with the buffer value (contents of the TIMx_PSC register).

The auto-reload active register is updated with the buffer value (contents of the TIMx_ARR register). If the

update source is a counter overflow, the auto-reload is updated before the counter is reloaded, so that the

next period is the expected one. The counter is loaded with the new value.

Figure 9-9, Figure 9-10, and Figure 9-11 show some examples of the counter behavior for different clock

frequencies.

Figure 9-9. Counter Timing Diagram, Internal Clock Divided by 1, TIMx_ARR = 0x6

Figure 9-10. Counter Timing Diagram, Update Event with TIM_ARBE = 1 (counter underflow)

9-8

120-035X-000D

Preliminary

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