參數(shù)資料
型號(hào)： MC68HC705BD3
廠商： Motorola, Inc.
英文描述： 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述： 8位微控制器單元（MCU）。（8位微控制器）
文件頁(yè)數(shù)： 65/112頁(yè)
文件大小： 676K
代理商： MC68HC705BD3
MC68HC05BD3
MOTOROLA
8-5
SYNC SIGNAL PROCESSOR
8
a vertical sync pulse is detected, and the content of the Horizontal sync pulse counter is loaded
into the Horizontal Sync Register before the Low Pulse Duration Counter is reset.
Comparator compares the values of the Horizontal Sync Pulse Counter and Horizontal Sync
Register, and gives the equal signal to the Sync Separation Logic.
High Pulse Duration Counter examines the high pulse width of the incoming composite sync
signal. If it is longer than a specific value (8
μ
s or 16 t
CYC
), the vertical sync pulse has finished and
finish signal will be given to the Sync Separation Logic.
Sync Separation Logic passes the composite sync signal to the Hsync output, until there is an
“equal” signal from the comparator. The Hsync output will then output a reassembled waveform
by the Sync Insertion Circuit to emulate the HSYNC pulses, and the Vsync output is set to low at
the coming falling edge of the composite signal. After the finish signal has been sensed, the Vsync
output is fixed to high, and the Hsync output follows the composite sync input again.
8.1.5
Vertical Sync Pulse Reshaper
For separate sync inputs, the vertical sync pulse width VTTL equals to the incoming vertical sync
input. For composite sync input, the Sync Pulse Reshaper widens the VTTL pulse width by 9.5
μ
s.
8.1.6
Sync Signal Counters
There are two counters (horizontal line counter and vertical frequency counter) to count the
number of horizontal sync pulses and the number of system clock cycles between two vertical
sync pulses. These two data can be read by the CPU to check the signal frequencies and can be
used to determine the video mode. Figure 8-4 shows a more detailed block diagram of these
counters. The 13-bit vertical frequency register encompasses vertical frequency range from
approximately 15Hz to 125KHz. Figure 8-5 shows the vertical frequency counter timing. It
indicates that there will be
±
1 count error on the reading from the register for the same vertical
frequency.
8.2
VSYNC Interrupt
The Sync Signal Processor will generate interrupts to the CPU if the VSYNC Interrupt Enable
(VSIE) bit is set, and the I-bit in the Condition Code Register (CCR) is cleared. The interrupt will
occur at each leading edge of VSYNC.
The interrupt vector address is at $3FF8-$3FF9, and the interrupt latch is cleared automatically
by fetching of the interrupt vectors.
TPG
相關(guān)PDF資料
PDF描述
MC68HC05C4 8-Bit Microcontroller Units (MCU).(8位微控制器)
MC68HC05C5 8-Bit Microcontroller Units (MCU).(8位微控制器)
MC68HC05C8A Microcontrollers
MC68HC05C9A 8-Bit Microcontroller(8位微控制器)
MC68HCL05C9A 8-Bit Microcontroller(8位微控制器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC705BD3P 制造商:Motorola 功能描述:MOTOROLA NXC4C
MC68HC705BD7P1 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HC705C4ACP 制造商:Freescale Semiconductor 功能描述:
MC68HC705C8AB 功能描述:IC MCU 8K OTP 2.1MHZ 42-SDIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 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
MC68HC705C8ACB 制造商:Rochester Electronics LLC 功能描述:HCO5 CORE + 8K RAM + EPR - Bulk
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

*
*
*