- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379934 > COP8SAA728N8 (NATIONAL SEMICONDUCTOR CORP) 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging PDF資料下載
參數(shù)資料
| 型號： | COP8SAA728N8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging |
| 中文描述： | 8-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PDIP28 |
| 封裝： | DIP-28 |
| 文件頁數(shù)： | 22/60頁 |
| 文件大?。?/td> | 787K |
| 代理商： | COP8SAA728N8 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁當前第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁
7.0 Timers
(Continued)
7.2.3 Mode 3. Input Capture Mode
The device can precisely measure external frequencies or
time external events by placing the timer block, T1, in the in-
put capture mode. In this mode, the reload registers serve as
independent capture registers, capturing the contents of the
timer when an external event occurs (transition on the timer
input pin). The capture registers can be read while maintain-
ing count, a feature that lets the user measure elapsed time
and time between events. By saving the timer value when
the external event occurs, the time of the external event is
recorded. Most microcontrollers have a latency time be-
cause they cannot determine the timer value when the exter-
nal event occurs. The capture register eliminates the latency
time, thereby allowing the applications program to retrieve
the timer value stored in the capture register.
In this mode, the timer T1 is constantly running at the fixed t
C
rate. The two registers, R1A and R1B, act as capture regis-
ters. Each register acts in conjunction with a pin. The register
R1A acts in conjunction with the T1A pin and the register
R1B acts in conjunction with the T1B pin.
The timer value gets copied over into the register when a
trigger event occurs on its corresponding pin. Control bits,
T1C3, T1C2 and T1C1, allow the trigger events to be speci-
fied either as a positive or a negative edge. The trigger con-
dition for each input pin can be specified independently.
The trigger conditions can also be programmed to generate
interrupts. The occurrence of the specified trigger condition
on the T1A and T1B pins will be respectively latched into the
pending flags, T1PNDA and T1PNDB. The control flag
T1ENA allows the interrupt on T1A to be either enabled or
disabled. Setting the T1ENA flag enables interrupts to be
generated when the selected trigger condition occurs on the
T1A pin. Similarly, the flag T1ENB controls the interrupts
from the T1B pin.
Underflows from the timer can also be programmed to gen-
erate interrupts. Underflows are latched into the timer T1C0
pending flag (the T1C0 control bit serves as the timer under-
flow interrupt pending flag in the Input Capture mode). Con-
sequently, the T1C0 control bit should be reset when enter-
ing the Input Capture mode. The timer underflow interrupt is
enabled with the T1ENA control flag. When a T1A interrupt
occurs in the Input Capture mode, the user must check both
the T1PNDA and T1C0 pending flags in order to determine
whether a T1A input capture or a timer underflow (or both)
caused the interrupt.
Figure 17 shows a block diagram of the timer in Input Cap-
ture mode.
DS012838-24
FIGURE 17. Timer in Input Capture Mode
www.national.com
22
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| COP8SAA728N9 | 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging |
| COP8SAB5 | 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging |
| COP8SAB7 | 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging |
| COP8SAC5 | 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging |
| COP8SA | 8-Bit CMOS ROM Based and One-Time Programmable (OTP) Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging(8位基于CMOS ROM和一次可編程的帶1K到4K存儲器，加電復位和極小封裝的微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| COP8SAA728N9 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| COP8SAA7SLB8 | 功能描述:IC MCU OTP 8BIT 1K 28LAMINATECSP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:COP8™ 8SA 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| COP8SAA7SLB9 | 功能描述:IC MCU OTP 8BIT 1K 28LAMINATECSP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:COP8™ 8SA 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| COP8SAB5 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging |
| COP8SAB7 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging |
發(fā)布緊急采購，3分鐘左右您將得到回復。