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参数资料
型号： P87C380
厂商： NXP SEMICONDUCTORS
元件分类： 微控制器/微处理器
英文描述： Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口，同步监测和同步处理的监视器微控制器)
中文描述： 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PDIP42
封装： 0.600 INCH, PLASTIC, SOT-270-1, SDIP-42
文件页数： 37/84页
文件大小： 420K
代理商： P87C380
1997 Dec 12
37
Philips Semiconductors
Product specification
Microcontrollers for monitors with DDC
interface, auto-sync detection and sync proc.
P83Cx80; P87C380
8.
For the DAC = 0100 case.
If COMP = 1; then the analog input voltage is now
greater than V
ref
and therefore the digital input to the
DAC needs to be increased. Set the input to the DAC
to 0110.
If COMP = 0; then the analog input voltage is still lower
than V
ref
and therefore the digital input to the DAC
needs to be decreased again. Set the input to the DAC
to 0010.
9.
The operations detailed in 5, 6 and 7 above are
repeated and each time the digital input to the DAC is
changed accordingly; as dictated by the state of the
COMP bit.
The complete process is shown in Fig.21. Each time
the DAC input is changed the number of values which
the analog input can take is reduced by half. In this
manner the actual analog value is honed into. The
value of the analog input (V
A
) is determined by the
formulae:
V
16
As the conversion time of each compare operation is
greater than 6
μ
s but less than 9
μ
s; a NOP instruction is
recommended to be used in between the instructions that
select V
ref
; the ADC channel and read the COMP bit.
V
A
----------
DAC value
1
+
(
)
×
=
Fig.20 Block diagram of the ADC.
handbook, full pagewidth
4-BIT DAC
COMPARATOR
DAC3
DAC2
DAC1
DAC0
ADCE
DACHL
MGG049
ADC enable selection
DAC value selection
ENABLE
SELECTOR
ADC
CHANNEL
SELECTOR
P3.2/ADC0
P3.3/ADC1
Vref
EN
PORT INTERFACE
EN1
EN0
MOV A, ADCDAT
instruction
to read COMP bit
COMP bit
internal bus
channel selection
+
相关PDF资料
PDF描述
P83C880 Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口，同步监测和同步处理的监视器微控制器)
P83C180 Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口，同步监测和同步处理的监视器微控制器)
P83C370AAR Microcontrollers for PAL/SECAM TV with OSD and VST(带 OSD和 VST的在PAL/SECAM TV中应用的微控制器)
P83C570AAR Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC
P83C570 Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC
相关代理商/技术参数
参数描述
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P87C42 功能描述:IC MCU UNIV PERIF INTERFAC 40DIP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:87C42 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND
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P87C453EBL 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
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