μPD78F921x ONLY) User’s Manual U16994EJ6V0UD 173 9.6 Cautions for A/D Convert" />
參數(shù)資料
型號: UPD78F9210GR-JJG-A
廠商: Renesas Electronics America
文件頁數(shù): 85/175頁
文件大?。?/td> 0K
描述: MCU 8BIT 1KB FLASH MEM 16-SSOP
標(biāo)準(zhǔn)包裝: 1
系列: 78K0S/Kx1+
核心處理器: 78K0S
芯體尺寸: 8-位
速度: 10MHz
外圍設(shè)備: LVD,POR,PWM,WDT
輸入/輸出數(shù): 13
程序存儲器容量: 1KB(1K x 8)
程序存儲器類型: 閃存
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-SSOP(0.173",4.40mm 寬)
包裝: 托盤
其它名稱: 972-1045
UPD78F9210GR-JJG-A-ND
CHAPTER 9 A/D CONVERTER (
μPD78F921x ONLY)
User’s Manual U16994EJ6V0UD
173
9.6
Cautions for A/D Converter
(1) Operating current in STOP mode
To satisfy the DC characteristics of the supply current in the STOP mode, clear bit 7 (ADCS) and bit 0 (ADCE) of
the A/D converter mode register (ADM) to 0 before executing the STOP instruction.
(2) Input range of ANI0 to ANI3
Observe the rated range of the ANI0 to ANI3 input voltage. If a voltage of VDD or higher and VSS or lower (even in
the range of absolute maximum ratings) is input to an analog input channel, the converted value of that channel
becomes undefined. In addition, the converted values of the other channels may also be affected.
(3) Conflicting operations
<1>
Conflict between A/D conversion result register (ADCR, ADCRH) write and ADCR, ADCRH read by
instruction upon the end of conversion
ADCR, ADCRH read has priority. After the read operation, the new conversion result is written to ADCR,
ADCRH.
<2>
Conflict between ADCR, ADCRH write and A/D converter mode register (ADM) write or analog input
channel specification register (ADS) write upon the end of conversion
ADM or ADS write has priority. ADCR, ADCRH write is not performed, nor is the conversion end interrupt
signal (INTAD) generated.
(4) Noise countermeasures
To maintain the 10-bit resolution, attention must be paid to noise input to the VDD pin and ANI0 to ANI3 pins.
<1>
Connect a capacitor with a low equivalent resistance and a high frequency response to the power supply.
<2>
Because the effect increases in proportion to the output impedance of the analog input source, it is
recommended that a capacitor be connected externally, as shown in Figure 9-19, to reduce noise.
<3>
Do not switch the A/D conversion function of the ANI0 to ANI3 pins to their alternate functions during
conversion.
<4>
The conversion accuracy can be improved by setting HALT mode immediately after the conversion starts.
Figure 9-19. Analog Input Pin Connection
Reference
voltage
input
C = 0.01 to 0.1 F
If there is a possibility that noise equal to or higher than VDD or
equal to or lower than VSS may enter, clamp with a diode with a
small VF value (0.3 V or lower).
VDD
VSS
ANI0 to ANI3
μ
相關(guān)PDF資料
PDF描述
P87LPC760BDH,118 IC 80C51 MCU 1KB OTP 14TSSOP
MC74HCT4851ADTG ANALOG MULTIPLEXERS/DEMUL TSSOP
MC74HCT4851ADG ANALOG MULTIPLEXERS/DEMUL SOIC16
MC74HC4851ADG IC MUX/DEMUX 8X1 16SOIC
ISL54228IRTZ-T IC USB SWITCH DPST OVP 8TDFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD78F9210MA-FAA-AX 制造商:Renesas Electronics Corporation 功能描述:78K0S/KY1+ MCU, 1KB FLASH, 0.125KB RAM, 16-SSOP - Trays 制造商:Renesas Electronics Corporation 功能描述:IC MCU 8BIT 1KB FLASH 16SSOP 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 10MHZ 1KB 16SSOP
UPD78F9211CS-CAB-A 功能描述:MCU 8BIT 2KB FLASH 16PIN RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:78K0S/Kx1+ 標(biāo)準(zhǔn)包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO,I²C,LIN,UART/USART 外圍設(shè)備:DMA,LVD,POR,PWM,WDT 輸入/輸出數(shù):27 程序存儲器容量:16KB(16K x 8) 程序存儲器類型:閃存 EEPROM 大小:- 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 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤
UPD78F9211FH-2A2-A 制造商:Renesas Electronics Corporation 功能描述:
UPD78F9211GR(T)-JJG-A 制造商:Renesas Electronics Corporation 功能描述:MCU 8-Bit 78K0S CISC 2KB Flash 5V 16-Pin SSOP
UPD78F9211GR(T)-JJG-E1-A 制造商:Renesas Electronics Corporation 功能描述:MCU 8-Bit 78K0S CISC 2KB Flash 5V 16-Pin SSOP