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參數(shù)資料
| 型號： | HD404324 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-bit HMCS400-series microcomputer(4位單片微計算機) |
| 中文描述： | 4位HMCS400系列微電腦（4位單片微計算機） |
| 文件頁數(shù)： | 56/94頁 |
| 文件大?。?/td> | 573K |
| 代理商： | HD404324 |
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HD404328 Series
56
A/D Converter
The MCU has a built-in A/D converter that uses a sequential comparison method with a resistor ladder. It
can measure four analog inputs with an eight-bit resolution. As shown in the block diagram of figure 34,
the A/D converter has a four-bit A/D mode register, a one-bit A/D start flag, and a four-bit plus four-bit
A/D data register.
4
4
4
Comparator
Operation mode signal
(Stop mode, Watch mode, Subactive mode: Value is 0)
AN
0
AN
1
AN
2
AN
3
AV
1
2
1
Internal bus line (S2)
Internal bus line (S1)
A/D mode register
(AMR: $016)
A/D start flag
(ADSF: $020)
A/D data register
(ADRL: $017,
ADRU: $018)
Control logic
Counter
IFAD
S
+
–
CC
AV
SS
1
Figure 34 A/D Converter Block Diagram
A/D Mode Register (AMR: $016):
Four-bit write-only register which selects the A/D conversion period
and indicates analog input pin information. Bit 0 of the AMR selects the A/D conversion period, and bits 2
and 3 select a channel, as shown in figure 35.
A/D Start Flag (ADSF: $020, Bit 2):
One-bit flag that initiates A/D conversion when 1 is written to it.
At the completion of A/D conversion, the converted data is stored in the A/D data register and the ADSF is
cleared. Refer to figure 35.
Note:
Use the SEM and SEMD instructions to write data to the ADSF, but make sure that the ADSF is
not written to during A/D conversion.
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相關代理商/技術參數(shù) |
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| HD404324FS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
| HD404324H | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
| HD404324S | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
| HD404324U | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
| HD404324UFS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
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