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參數(shù)資料
| 型號： | HT46R46 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Cost-Effective A/D Type 8-Bit MCU |
| 中文描述： | 成本效益的A / D型8位微控制器 |
| 文件頁數(shù)： | 18/42頁 |
| 文件大?。?/td> | 291K |
| 代理商： | HT46R46 |
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HT46R46/HT46C46/HT46R47/HT46C47
Rev. 1.00
18
December 28, 2004
A/D Converter
The 4 channels and 8-bit resolution for the HT46R46/
HT46C46 or 9-bit resolution for the HT46R47/HT46C47
A/D converter are implemented in this microcontroller.
The reference voltage is VDD. The A/D converter con-
tains 3 special registers for the HT46R46/HT46C46
which are; ADR (21H), ADCR (22H) and ACSR (23H) or
contains 4 special registers for the HT46R47/HT46C47
whice are; ADRL (20H), ADRH (21H), ADCR (22H) and
ACSR (23H). The ADR is HT46R46/ HT46C46 an A/D
result register that is read-only. The ADRH and ADRL
are HT46R47/HT46C47 A/D result register higher-order
byte and lower-order byte which are read-only. After the
A/D conversion is completed, the ADR (HT46R46/
HT46C46) or ADRL, ADRH (HT46R47/HT46C47)
should be read to get the conversion result data. The
ADCR is an A/D converter control register, which de-
fines the A/D channel number, analog channel select,
start A/D conversion control bit and the end of A/D con-
version flag. If the users want to start an A/D conversion,
define PB configuration, select the converted analog
channel, and give START bit a raising edge and a falling
edge (0
EOCB bit is cleared and an A/D converter interrupt oc-
curs (if the A/D converter interrupt is enabled). The
ACSR is A/D clock setting register, which is used to se-
lect the A/D clock source.
1
0). At the end of A/D conversion, the
The A/D converter control register is used to control the
A/D converter. The bit2~bit0 of the ADCR are used to
select an analog input channel. There are a total of four
channels to select. The bit5~bit3 of the ADCR are used
to set PB configurations. PB can be an analog input or
as digital I/O line decided by these 3 bits. Once a PB line
is selected as an analog input, the I/O functions and
pull-high resistor of this I/O line are disabled, and the
A/D converter circuit is power on. The EOCB bit (bit6 of
the ADCR) is end of A/D conversion flag. Check this bit
to know when A/D conversion is completed. The START
bit of the ADCR is used to begin the conversion of A/D
converter. Give START bit a raising edge and falling
edge that means the A/D conversion has started. In or-
der to ensure the A/D conversion is completed, the
START should stay at 0 until the EOCB is cleared to
0 (end of A/D conversion).
The bit 7 of the ACSR is used for testing purpose only. It
can not be used for the users. The bit1 and bit0 of the
ACSR are used to select A/D clock sources.
When the A/D conversion is completed, the A/D inter-
rupt request flag is set. The EOCB bit is set to 1 when
the START bit is set from 0 to 1 .
Register Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
ADR
D7
D6
D5
D4
D3
D2
D1
D0
Note:
D0~D7 is A/D conversion result data bit
LSB~MSB.
ADR (21H) Register for HT46R46/HT46C46
Register Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
ADRL
D0
ADRH
D8
D7
D6
D5
D4
D3
D2
D1
Note:
D0~D8 is A/D conversion result data bit
LSB~MSB.
ADRL(20H),ADRH(21H)RegisterforHT46R47/HT46C47
)
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相關(guān)PDF資料 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT46R46_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective A/D Type 8-Bit MCU |
| HT46R46E | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective A/D Type 8-Bit MCU |
| HT46R46E_07 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective A/D Type 8-Bit MCU |
| HT46R46-H | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective A/D Type 8-Bit OTP MCU |
| HT46R47 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit OTP Battery Charger Controller |
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