參數(shù)資料
型號: μPD789197
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 58/146頁
文件大小: 630K
代理商: ΜPD789197
Preliminary Product Information
58
μ
PD789186, 789187, 789196, 789197
6.7
A/D Converter
A/D converters support different conversion resolutions, depending on the microcontroller model, as shown below:
A/D converters with an 8-bit resolution: for
μ
PD789186 and
μ
PD789187
A/D converters with a 10-bit resolution: for
μ
PD789196 and
μ
PD789197
6.7.1
A/D converter functions
The A/D converter converts input analog voltages to digital signals with an 8-bit or 10-bit resolution. It can control
up to eight analog input channels (ANI0 to ANI7).
A/D conversion can be started only by software.
One of analog inputs ANI0 to ANI7 is selected for A/D conversion. A/D conversion is performed repeatedly, with
an interrupt request (INTAD0) being issued each time an A/D conversion is completed.
6.7.2
Configuration of the A/D converter
The A/D converter consists of the following hardware.
Table 6-11. A/D Converter Configuration
Item
Configuration
Analog input
8 channels (ANI0 to ANI7)
Register
Successive approximation register (SAR)
A/D conversion result register 0 (ADCR0)
Control register
A/D converter mode register 0 (ADM0)
A/D input selection register 0 (ADS0)
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