μPD78F921x ONLY) User’s Manual U16994EJ6V0UD 170 The setting method is descri" />
參數(shù)資料
型號: UPD78F9512GR-JJG-A
廠商: Renesas Electronics America
文件頁數(shù): 82/175頁
文件大?。?/td> 0K
描述: MCU 8BIT SGL CHIP 16PIN
標準包裝: 400
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: 4KB(4K 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
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
CHAPTER 9 A/D CONVERTER (
μPD78F921x ONLY)
User’s Manual U16994EJ6V0UD
170
The setting method is described below.
<1>
Set bit 0 (ADCE) of the A/D converter mode register (ADM) to 1.
<2>
Select the channel and conversion time using bits 1 and 0 (ADS1, ADS0) of the analog input channel
specification register (ADS) and bits 5 to 3 (FR2 to FR0) of ADM.
<3>
Execute two NOP instructions or an instruction equivalent to two machine cycles.
<4>
Set bit 7 (ADCS) of ADM to 1 to start A/D conversion.
<5>
An interrupt request signal (INTAD) is generated.
<6>
Transfer the A/D conversion data to the A/D conversion result register (ADCR, ADCRH).
<Change the channel>
<7>
Change the channel using bits 1 and 0 (ADS1, ADS0) of ADS to start A/D conversion.
<8>
An interrupt request signal (INTAD) is generated.
<9>
Transfer the A/D conversion data to the A/D conversion result register (ADCR, ADCRH).
<Complete A/D conversion>
<10> Clear ADCS to 0.
<11> Clear ADCE to 0.
Cautions 1. Make sure the period of <1> to <4> is 1
μs or more.
2. It is no problem if the order of <1> and <2> is reversed.
3. <1> can be omitted. However, ignore the data resulting from the first conversion after
<4> in this case.
4. The period from <5> to <8> differs from the conversion time set using bits 5 to 3 (FR2 to
FR0) of ADM. The period from <7> to <8> is the conversion time set using FR2 to FR0.
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