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Z8F012APB020SC 参数 Datasheet PDF下载

Z8F012APB020SC图片预览
型号: Z8F012APB020SC
PDF下载: 下载PDF文件 查看货源
内容描述: Z8喝采XP -R 4K系列高性能8位微控制器 [Z8 Encore XP-R 4K Series High-Performance 8-Bit Microcontrollers]
分类和应用: 微控制器外围集成电路光电二极管时钟
文件页数/大小: 276 页 / 3422 K
品牌: ZILOG [ ZILOG, INC. ]
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Z8 Encore! XP® 4K Series  
Product Specification  
75  
Set the Capture edge (rising or falling) for the Timer Input.  
2. Write to the Timer High and Low Byte registers to set the starting count value  
(typically 0001H).  
3. Write to the Timer Reload High and Low Byte registers to set the Compare value.  
4. Enable the timer interrupt, if appropriate, and set the timer interrupt priority by writing  
to the relevant interrupt registers.By default, the timer interrupt are generated for both  
input capture and reload events. If appropriate, configure the timer interrupt to be  
generated only at the input capture event or the reload event by setting TICONFIG  
field of the TxCTL0 register.  
5. Configure the associated GPIO port pin for the Timer Input alternate function.  
6. Write to the Timer Control register to enable the timer.  
7. Counting begins on the first appropriate transition of the Timer Input signal. No  
interrupt is generated by this first edge.  
In CAPTURE/COMPARE mode, the elapsed time from timer start to Capture event can be  
calculated using the following equation:  
(Capture Value Start Value) × Prescale  
Capture Elapsed Time (s) = ---------------------------------------------------------------------------------------------------------  
System Clock Frequency (Hz)  
Reading the Timer Count Values  
The current count value in the timers can be read while counting (enabled). This capability  
has no effect on timer operation. When the timer is enabled and the Timer High Byte reg-  
ister is read, the contents of the Timer Low Byte register are placed in a holding register. A  
subsequent read from the Timer Low Byte register returns the value in the holding register.  
This operation allows accurate reads of the full 16-bit timer count value while enabled.  
When the timers are not enabled, a read from the Timer Low Byte register returns the  
actual value in the counter.  
Timer Pin Signal Operation  
Timer Output is a GPIO Port pin alternate function. The Timer Output is toggled every  
time the counter is reloaded.  
The Timer Input can be used as a selectable counting source. It shares the same pin as the  
complementary timer output. When selected by the GPIO Alternate Function Registers,  
this pin functions as a timer input in all modes except for the DUAL PWM OUTPUT  
mode. For this mode, there is no timer input available.  
PS022815-0206  
Timers