參數(shù)資料
型號(hào)： CYRF69213
廠商： Cypress Semiconductor Corp.
英文描述： Programmable Radio on Chip Low Power
中文描述： 可編程片上無線電低功耗
文件頁數(shù)： 26/85頁
文件大?。?/td> 731K
代理商： CYRF69213
CYRF69213
Document #: 001-07552 Rev. *B
Page 26 of 85
Interval Timer Clock (ITMRCLK)
The Interval Timer Clock (ITMRCLK) can be sourced from the
external crystal oscillator, the Internal 24-MHz oscillator, the
internal 32-KHz low-power oscillator, or the timer capture
clock. A programmable prescaler of 1, 2, 3, or 4 then divides
the selected source. The 12-bit Programmable Interval Timer
is a simple down counter with a programmable reload value.
It provides a 1-
μ
s resolution by default. When the down
counter reaches zero, the next clock is spent reloading. The
reload value can be read and written while the counter is
running, but care should be taken to ensure that the counter
does not unintentionally reload while the 12-bit reload value is
only partially stored—for example, between the two writes of
the 12-bit value. The programmable interval timer generates
an interrupt to the CPU on each reload.
The parameters to be set will appear on the device editor view
of PSoC Designer once you place the CYRF69213 Timer User
Module. The parameters are PITIMER_Source and
PITIMER_Divider. The PITIMER_Source is the clock to the
timer and the PITMER_Divider is the value the clock is divided
by.
The interval register (PITMR) holds the value that is loaded
into the PIT counter on terminal count. The PIT counter is a
down counter.
The Programmable Interval Timer resolution is configurable.
For example:
TCAPCLK divide by x of CPU clock (for example TCAPCLK
divide by 2 of a 24-MHz CPU clock will give a frequency of
12 MHz)
ITMRCLK divide by x of TCAPCLK (for example, ITMRCLK
divide by 3 of TCAPCLK is 4 MHz so resolution is 0.25
μ
s)
Timer Capture Clock (TCAPCLK)
The Timer Capture clock can be sourced from the external
crystal oscillator, internal 24-MHz oscillator or the Internal
332-KHz low-power oscillator. A programmable prescaler of 2,
4, 6, or 8 then divides the selected source.
Figure 10. Programmable Interval Timer Block Diagram
System
Clock
Clock
Timer
Configuration
Status and
Control
12-bit
reload
value
12-bit down
counter
12-bit
reload
counter
Interrupt
Controller
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CYRF69213_08 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Programmable Radio on Chip Low Power
CYRF69213_13 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Programmable Radio on Chip Low Power
CYRF69213-40LFXC 功能描述:射頻接收器 PRoC LP COM RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
CYRF69213-40LTXC 功能描述:8位微控制器 -MCU Programmable Radio on Chip Low Power RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
CYRF69213A-40LFXC 功能描述:8位微控制器 -MCU Programmable Radio on Chip Low Power RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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