收藏本站
参数资料
型号： ST7FLITE19BF0B6
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP20
封装： 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-20
文件页数： 122/159页
文件大小： 2855K
代理商： ST7FLITE19BF0B6
ST7LITE1xB
65/159
DUAL 12-BIT AUTORELOAD TIMER 4 (Cont’d)
■ Long Input Capture
Pulses that last more than 8
μs can be measured
with an accuracy of 4
μs if f
OSC = 8 MHz in the fol-
lowing conditions:
– The 12-bit AT4 Timer is clocked by the Lite Timer
(RTC pulse: CK[1:0] = 01 in the ATCSR register)
– The ICS bit in the ATCSR2 register is set so that
the LTIC pin is used to trigger the AT4 Timer cap-
ture.
– The signal to be captured is connected to LTIC
pin
– Input Capture registers LTICR, ATICRH and
ATICRL are read
This configuration allows to cascade the Lite Timer
and the 12-bit AT4 Timer to get a 20-bit input cap-
ture value. Refer to Figure 11.
Figure 45. Long Range Input Capture Block Diagram
Notes:
1. Since the input capture flags (ICF) for both tim-
ers (AT4 Timer and LT Timer) are set when signal
transition occurs, software must mask one inter-
rupt by clearing the corresponding ICIE bit before
setting the ICS bit.
2. If the ICS bit changes (from 0 to 1 or from 1 to
0), a spurious transition might occur on the input
capture signal because of different values on LTIC
and ATIC. To avoid this situation, it is recommend-
ed to do as follows:
– First, reset both ICIE bits.
– Then set the ICS bit.
– Reset both ICF bits.
– And then set the ICIE bit of desired interrupt.
3. How to compute a pulse length with long input
capture feature.
As both timers are used, computing a pulse length
is not straight-forward. The procedure is as fol-
lows:
– At the first input capture on the rising edge of the
pulse, we assume that values in the registers are
as follows:
LTICR = LT1
ATICRH = ATH1
ATICRL = ATL1
Hence ATICR1 [11:0] = ATH1 & ATL1
Refer to Figure 12.
LTIC
ATIC
ICS
1
0
12-bit Input Capture Register
OFF
fcpu
fLTIMER
12-bit Upcounter1
12-bit AutoReload Register
8-bit Input Capture Register
8-bit Timebase Counter1
fOSC/32
LTICR
CNTR1
ATICR
ATR1
8 LSB bits
12 MSB bits
LITE TIMER
12-Bit ARTIMER
20
cascaded
bits
32MHz
1
相关PDF资料
PDF描述
ST7PLITE15BF0B3 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP20
STR711FR0H3 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PBGA64
STR711FRH3 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PBGA64
STR711FZ2H3TR 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PBGA144
STR711FZT1TR 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP144
相关代理商/技术参数
参数描述
ST7FLITE19F1B6 功能描述:8位微控制器 -MCU Flash 4K SPI RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST7FLITE19F1B6 制造商:STMicroelectronics 功能描述:IC 8BIT FLASH MCU 7FLITE19 DIP20
ST7FLITE19F1M6 功能描述:8位微控制器 -MCU Flash 4K SPI RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST7FLITE20F1B6 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST7FLITE20F2B6 功能描述:8位微控制器 -MCU Flash 8K SPI 384 RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*