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參數(shù)資料
| 型號(hào)： | HD404364 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī)) |
| 中文描述： | 4位HMCS400系列微機(jī)（4位單片微計(jì)算機(jī)） |
| 文件頁(yè)數(shù)： | 90/115頁(yè) |
| 文件大?。?/td> | 710K |
| 代理商： | HD404364 |
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HD404369 Series
90
Notes on Usage
Use the SEM or SEMD instruction for writing to the A/D start flag (ADSF)
Do not write to the A/D start flag during A/D conversion
Data in the A/D data register during A/D conversion is undefined
Since the operation of the A/D converter is based on the clock from the system oscillator, the A/D
converter does not operate in stop, watch, or subactive mode. In addition, to save power while in these
modes, all current flowing through the converter’s resistance ladder is cut off.
If the power supply for the A/D converter is to be different from V
CC
, connect a 0.1-
μ
F bypass capacitor
between the AV
CC
and AV
SS
pins. (However, this is not necessary when the AV
CC
pin is directly
connected to the V
CC
pin.)
The contents of the A/D data register are not guaranteed during A/D conversion. To ensure that the A/D
converter operates stably, do not execute port output instructions during A/D conversion.
The port data register (PDR) is initialized to 1 by an MCU reset. At this time, if pull-up MOS is selected
as active by bit 3 of the miscellaneous register (MIS3), the port will be pulled up to V
CC
. When using a
shared R port/analog input pin as an input pin, clear PDR to 0. Otherwise, if pull-up MOS is selected by
MIS3 and PDR is set to 1, a pin selected by A/D mode register 1 or 2 (AMR1 or AMR2) as an analog
pin will remain pulled up (figure 78).
V
CC
V
CC
HLT
MIS3
AMR
A/D mode register value
DCR
PDR
CPU input
Input control signal
ACR
A/D channel register value
A/D input
Figure 78 R Port/Analog Multiplexed Pin Circuit
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| HD407A4369 | 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī)) |
| HD4043612 | 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī)) |
| HD404369 | 4-bit HMCS400-Series microcomputer |
| HD404369H | 4-bit HMCS400-Series microcomputer |
| HD404369S | 4-bit HMCS400-Series microcomputer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD404364F | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer has an A/D converter |
| HD404364H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer |
| HD404364S | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer has an A/D converter |
| HD404368 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HMCS43XXFamily User＇s Manual/Device |
| HD404368F | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer |
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