參數(shù)資料
型號(hào)： COP8CBR9LVA8
廠商： National Semiconductor
文件頁數(shù)： 51/111頁
文件大?。?/td> 0K
描述： IC MCU EEPROM 8BIT 32K 68PLCC
標(biāo)準(zhǔn)包裝： 18
系列： COP8™ 8C
核心處理器： COP8
芯體尺寸： 8-位
速度： 20MHz
連通性： Microwire/Plus（SPI），UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 59
程序存儲(chǔ)器容量： 32KB（32K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 16x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 68-LCC（J 形引線）
包裝： 管件
其它名稱： *COP8CBR9LVA8
SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
Any time the IDLE Timer period is changed there is the possibility of generating a spurious IDLE Timer
interrupt by setting the T0PND bit. The user is advised to disable IDLE Timer interrupts prior to changing
the value of the ITSEL bits of the ITMR Register and then clear the T0PND bit before attempting to
synchronize operation to the IDLE Timer.
5.11.2 TIMER T1, TIMER T2, AND TIMER T3
The device has a set of three powerful timer/counter blocks, T1, T2, and T3. Since T1, T2 and T3 are
identical, except for the high speed operation of T2 and T3, all comments are equally applicable to any of
the three timer blocks which will be referred to as Tx. Differences between the timers will be specifically
noted.
Each timer block consists of a 16-bit timer, Tx, and two supporting 16-bit autoreload/capture registers,
RxA and RxB. Each timer block has two pins associated with it, TxA and TxB. The pin TxA supports I/O
required by the timer block, while the pin TxB is an input to the timer block. The timer block has three
operating modes: Processor Independent PWM mode, External Event Counter mode, and Input Capture
mode.
The control bits TxC3, TxC2, and TxC1 allow selection of the different modes of operation.
5.11.2.1 Timer Operating Speeds
Each of the Tx timers, except T1, have the ability to operate at either the instruction cycle frequency (low
speed) or the internal clock frequency (MCLK). For 10 MHz CKI, the instruction cycle frequency is 2 MHz
and the internal clock frequency is 20 MHz. This feature is controlled by the High Speed Timer Control
Register, HSTCR. Its format is shown below. To place a timer, Tx, in high speed mode, set the
appropriate TxHS bit to 1. For low speed operation, clear the appropriate TxHS bit to 0. This register is
cleared to 00 on Reset.
HSTCR
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
1
0
0
T3HS
T2HS
5.11.2.2 Mode 1. Processor Independent PWM Mode
One of the timer's operating modes is the Processor Independent PWM mode. In this mode, the timers
generate a “Processor Independent” PWM signal because once the timer is set up, no more action is
required from the CPU which translates to less software overhead and greater throughput. The user
software services the timer block only when the PWM parameters require updating. This capability is
provided by the fact that the timer has two separate 16-bit reload registers. One of the reload registers
contains the “ON” time while the other holds the “OFF” time. By contrast, a microcontroller that has only a
single reload register requires an additional software to update the reload value (alternate between the on-
time/off-time).
The timer can generate the PWM output with the width and duty cycle controlled by the values stored in
the reload registers. The reload registers control the countdown values and the reload values are
automatically written into the timer when it counts down through 0, generating interrupt on each reload.
Under software control and with minimal overhead, the PWM outputs are useful in controlling motors,
triacs, the intensity of displays, and in providing inputs for data acquisition and sine wave generators.
In this mode, the timer Tx counts down at a fixed rate of tC (T2 and T3 may be selected to operate from
MCLK). Upon every underflow the timer is alternately reloaded with the contents of supporting registers,
RxA and RxB. The very first underflow of the timer causes the timer to reload from the register RxA.
Subsequent underflows cause the timer to be reloaded from the registers alternately beginning with the
register RxB.
Figure 5-10 shows a block diagram of the timer in PWM mode.
44
Functional Description
Copyright 2000–2013, Texas Instruments Incorporated
Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9
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COP8CCE9HLQ7 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Virtual EEPROM, 10-Bit A/D and Brownout Reset
COP8CCE9HLQ9 功能描述:IC MCU FLASH 8BIT 8K A/D 44LLP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:COP8™ 8C 標(biāo)準(zhǔn)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(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB（20K x 16） 程序存儲(chǔ)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
COP8CCE9HVA7 功能描述:8位微控制器 -MCU 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
COP8CCE9HVA7/NOPB 功能描述:8位微控制器 -MCU 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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