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| 型號： | HD404339FS |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-bit HMCS400-Series microcomputer with large-capacity memory |
| 中文描述： | 4位HMCS400系列的大容量存儲器微機(jī) |
| 文件頁數(shù)： | 57/78頁 |
| 文件大小： | 337K |
| 代理商： | HD404339FS |
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HD404339 Series
57
A/D Converter
The MCU also contains a built-in A/D converter that uses a sequential comparison method with a
resistance ladder. It can perform digital conversion of twelve analog inputs with 8-bit resolution. The
following describes the A/D converter.
A/D mode register 1 (AMR1: $019) is used to select digital or analog ports
A/D mode register 2 (AMR2: $01A) is used to set the A/D conversion speed and to select digital or
analog ports
The A/D channel register (ACR: $016) is used to select an analog input channel
A/D conversion is started by setting the A/D start flag (ADSF: $020, 2) to 1. After the conversion is
completed, converted data is stored in the A/D data register, and at the same time the A/D start flag is
cleared to 0.
By setting the I
AD
off flag (IAOF: $021, 2) to 1, the current flowing through the resistance ladder can be
cut off even while operating in standby or active mode
The A/D data register is a read-only register consisting of a lower 4 bits and upper 4 bits (ADRL: $017,
ADRU: $018). This register is not cleared by a reset. Data reads during A/D conversion are not
guaranteed. After A/D conversion ends, the resultant 8-bit data is set in this register and held until the
start of the next conversion (figures 51 to 53).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD404339S | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer with large-capacity memory |
| HD404339SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| HD404341FP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD404341FT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD404341R | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers |
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