欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號(hào)： MC68332CFV20
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 32-Bit Modular Microcontroller
中文描述： 32-BIT, 20 MHz, MICROCONTROLLER, PQFP144
封裝： QFP-144
文件頁(yè)數(shù)： 40/88頁(yè)
文件大小： 446K
代理商： MC68332CFV20
MOTOROLA
40
MC68332
MC68332TS/D
3.7.3 Reset Timing
The RESET input must be asserted for a specified minimum period in order for reset to occur. External
RESET assertion can be delayed internally for a period equal to the longest bus cycle time (or the bus
monitor time-out period) in order to protect write cycles from being aborted by reset. While RESET is
asserted, SIM pins are either in a disabled high-impedance state or are driven to their inactive states.
When an external device asserts RESET for the proper period, reset control logic clocks the signal into
an internal latch. The control logic drives the RESET pin low for an additional 512 CLKOUT cycles after
it detects that the RESET signal is no longer being externally driven, to guarantee this length of reset
to the entire system.
If an internal source asserts a reset signal, the reset control logic asserts RESET for a minimum of 512
cycles. If the reset signal is still asserted at the end of 512 cycles, the control logic continues to assert
RESET until the internal reset signal is negated.
After 512 cycles have elapsed, the reset input pin goes to an inactive, high-impedance state for ten cy-
cles. At the end of this 10-cycle period, the reset input is tested. When the input is at logic level one,
reset exception processing begins. If, however, the reset input is at logic level zero, the reset control
logic drives the pin low for another 512 cycles. At the end of this period, the pin again goes to high-
impedance state for ten cycles, then it is tested again. The process repeats until RESET is released.
3.7.4 Power-On Reset
When the SIM clock synthesizer is used to generate the system clock, power-on reset involves special
circumstances related to application of system and clock synthesizer power. Regardless of clock
source, voltage must be applied to clock synthesizer power input pin V
DDSYN
in order for the MCU to
operate. The following discussion assumes that V
DDSYN
is applied before and during reset. This mini-
mizes crystal start-up time. When V
DDSYN
is applied at power-on, start-up time is affected by specific
crystal parameters and by oscillator circuit design. V
DD
ramp-up time also affects pin state during reset.
During power-on reset, an internal circuit in the SIM drives the internal (IMB) and external reset lines.
The circuit releases the internal reset line as V
DD
ramps up to the minimum specified value, and SIM
pins are initialized. When V
DD
reaches the specified minimum value, the clock synthesizer VCO begins
operation. Clock frequency ramps up to the specified limp mode frequency. The external RESET line
remains asserted until the clock synthesizer PLL locks and 512 CLKOUT cycles elapse.
The SIM clock synthesizer provides clock signals to the other MCU modules. After the clock is running
and the internal reset signal is asserted for four clock cycles, these modules reset. V
DD
ramp time and
VCO frequency ramp time determine how long these four cycles take. Worst case is approximately 15
milliseconds. During this period, module port pins may be in an indeterminate state. While input-only
pins can be put in a known state by means of external pull-up resistors, external logic on input/output
or output-only pins must condition the lines during this time. Active drivers require high-impedance buff-
ers or isolation resistors to prevent conflict.
3.7.5 Use of Three State Control Pin
Asserting the three-state control (TSC) input causes the MCU to put all output drivers in an inactive,
high-impedance state. The signal must remain asserted for ten clock cycles in order for drivers to
change state. There are certain constraints on use of TSC during power-on reset:
When the internal clock synthesizer is used (MODCLK held high during reset), synthesizer ramp-
up time affects how long the ten cycles take. Worst case is approximately 20 milliseconds from TSC
assertion.
When an external clock signal is applied (MODCLK held low during reset), pins go to high-imped-
ance state as soon after TSC assertion as ten clock pulses have been applied to the EXTAL pin.
相關(guān)PDF資料
PDF描述
MC68332MFV20 32-Bit Modular Microcontroller
MC68332AVFC20 32-Bit Modular Microcontroller
MC68332AVFC16 32-Bit Modular Microcontroller
MC68332CFC16 32-Bit Modular Microcontroller
MC68332CFC20 32-Bit Modular Microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68332GCAG16 功能描述:32位微控制器 - MCU 32B MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MC68332GCAG20 功能描述:32位微控制器 - MCU 32B MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MC68332GCAG20B1 制造商:Freescale Semiconductor 功能描述:
MC68332GCAG25 功能描述:32位微控制器 - MCU 32B MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MC68332GCEH16 功能描述:32位微控制器 - MCU 32 Bit 16MHz RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*
主站蜘蛛池模板： 黔南| 铜鼓县| 商都县| 庆元县| 寿阳县| 五大连池市| 布拖县| 云阳县| 巴林左旗| 遵义县| 赤水市| 彰武县| 乌兰县| 鄱阳县| 长宁区| 咸丰县| 通州区| 古丈县| 台中市| 南雄市| 龙门县| 六枝特区| 滁州市| 四川省| 昌乐县| 永登县| 洛浦县| 丰镇市| 绥德县| 西青区| 富民县| 临清市| 恩平市| 金门县| 黄浦区| 名山县| 临武县| 绍兴县| 长宁区| 清远市| 神木县|