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型號(hào)：	UPD780076
廠商：	NEC Corp.
元件分類：	8位微控制器
英文描述：	8-Bit Single-Chip Microcontrollers
中文描述：	8位單芯片微控制器
文件頁(yè)數(shù)：	242/592頁(yè)
文件大?。?/td>	3307K
代理商：	UPD780076

CHAPTER 13 A/D CONVERTER

s Manual U14260EJ3V1UD

(7) Interrupt request flag (ADIF0)

The interrupt request flag (ADIF0) is not cleared even if analog input channel specification register 0 (ADS0) is

Therefore, if an analog input pin is changed during A/D conversion, the A/D conversion result and ADIF0 for the

pre-change analog input may be set just before the ADS0 rewrite. Caution is therefore required since, at this

time, when ADIF0 is read immediately just after the ADS0 rewrite, ADIF0 is set despite the fact that the A/D

conversion for the post-change analog input has not finished.

When A/D conversion is restarted after it is stopped, clear ADIF0 before restart.

Figure 13-17. A/D Conversion End Interrupt Request Generation Timing

n = 0, 1, ......, 7

m = 0, 1, ......, 7

(8) Conversion results just after A/D conversion start

If bit 7 (ADCS0) of A/D converter mode register 0 (ADM0) is set to 1 without setting bit 0 (ADCE0) to 1, the

A/D conversion value immediately after A/D conversion has been started may not satisfy the rated value. Take

measures such as polling the A/D conversion end interrupt request (INTAD0) and removing the first conversion

The same may apply if ADCS0 is set to 1 without a lapse of a wait time of 14

s (MIN.) after ADCE0 has been

set to 1. Make sure that the specified wait time elapses.

(9) A/D conversion result register 0 (ADCR0) read operation

When A/D converter mode register 0 (ADM0) and analog input channel specification register 0 (ADS0) are written,

the contents of ADCR0 may become undefined. Read the conversion result following conversion completion

before writing to ADM0 and ADS0. Using a timing other than the above may cause an incorrect conversion result

ADM0 rewrite

(start of ANIn conversion)

ADIF is set but ANIm

conversion has not finished.

A/D conversion

ADS0 rewrite

(start of ANIm conversion)

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
UPD780101MC-047-5A4-E1-A	制造商:Renesas Electronics Corporation 功能描述:
UPD780102MC-082-5A4-A	制造商:Renesas Electronics Corporation 功能描述:
UPD780102MC-083-5A4-A	制造商:Renesas Electronics Corporation 功能描述:
UPD780134GK-424-9ET-E3-A	制造商:Renesas Electronics Corporation 功能描述:
UPD78014GC-765-AB8	制造商:NEC Electronics Corporation 功能描述:

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