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| 型號(hào)： | COP8CCR9HLQ8 |
| 廠(chǎng)商： | National Semiconductor |
| 文件頁(yè)數(shù)： | 76/111頁(yè) |
| 文件大小： | 0K |
| 描述： | IC MCU FLASH 8BIT 32K A/D 44LLP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 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)： | 37 |
| 程序存儲(chǔ)器容量： | 32KB（32K x 8） |
| 程序存儲(chǔ)器類(lèi)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： | 44-WFQFN 裸露焊盤(pán) |
| 包裝： | 帶卷 (TR) |
| 其它名稱(chēng)： | COP8CCR9HLQ8TR |
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SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
Where:
BR is the Baud Rate
FC is the crystal frequency
N is the Baud Rate Divisor (Table 5-16)
P is the Prescaler Divide Factor selected by the value in the Prescaler Select Register (Table 5-17)
NOTE
In the Synchronous Mode, the divisor 16 is replaced by two.
Example:
Asynchronous Mode:
Crystal Frequency = 5 MHz
Desired baud rate = 19200
Using the above equation N × P can be calculated first.
N × P = (5 x 10
6 x 2)/(16 x 19200) = 32.552
Now 32.552 is divided by each Prescaler Factor (Table 5-17) to obtain a value closest to an integer. This
factor happens to be 6.5 (P = 6.5).
N = 32.552/6.5 = 5.008 (N = 5)
The programmed value (from Table 5-16) should be 4 (N - 1).
Using the above values calculated for N and P:
BR = (5 x 10
6 x 2)/(16 x 5 x 6.5) = 19230.769
error = (19230.769 - 19200) x 100/19200 = 0.16%
Figure 5-19. USART BAUD Clock Divisor Registers
5.13.8 EFFECT OF HALT/IDLE
The USART logic is reinitialized when either the HALT or IDLE modes are entered. This reinitialization
sets the TBMT flag and resets all read only bits in the USART control and status registers. Read/Write bits
remain unchanged. The Transmit Buffer (TBUF) is not affected, but the Transmit Shift register (TSFT) bits
are set to one. The receiver registers RBUF and RSFT are not affected.
The device will exit from the HALT/IDLE modes when the Start bit of a character is detected at the RDX
(L3) pin. This feature is obtained by using the Multi-Input Wake-up scheme provided on the device.
Before entering the HALT or IDLE modes the user program must select the Wake-up source to be on the
RDX pin. This selection is done by setting bit 3 of WKEN (Wake-up Enable) register. The Wake-up trigger
condition is then selected to be high to low transition. This is done via the WKEDG register (Bit 3 is one).
If the device is halted and crystal oscillator is used, the Wake-up signal will not start the chip running
immediately because of the finite start up time requirement of the crystal oscillator. The idle timer (T0)
generates a fixed (256 tC) delay to ensure that the oscillator has indeed stabilized before allowing the
device to execute code. The user has to consider this delay when data transfer is expected immediately
after exiting the HALT mode.
Copyright 2000–2013, Texas Instruments Incorporated
Functional Description
67
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| COP8CCR9HVA7 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 32k Memory, Virtual EEPROM, 10-Bit A/D and Brownout |
| COP8CCR9HVA8 | 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(xiàn)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 |
| COP8CCR9HVA8/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(xiàn)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 |
| COP8CCR9IMT7 | 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(xiàn)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 |
| COP8CCR9IMT7/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(xiàn)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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