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| 型号： | ADUC812BSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 6/57页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT MULTICH MCU 52-MQFP |
| 产品培训模块： | Process Control |
| 标准包装： | 1 |
| 系列： | MicroConverter® ADuC8xx |
| 核心处理器： | 8052 |
| 芯体尺寸： | 8-位 |
| 速度： | 16MHz |
| 连通性： | I²C，SPI，UART/USART |
| 外围设备： | PSM，温度传感器，WDT |
| 输入/输出数： | 34 |
| 程序存储器容量： | 8KB（8K x 8） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 640 x 8 |
| RAM 容量： | 256 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 数据转换器： | A/D 8x12b，D/A 2x12b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 52-QFP |
| 包装： | 托盘 |
| 产品目录页面： | 738 (CN2011-ZH PDF) |
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REV.
ADuC812
–14–
ADCCON2—(ADC Control SFR #2)
The ADCCON2 register controls ADC channel selection and conversion modes as detailed below.
SFR Address
D8H
SFR Power-On Default Value
00H
I
C
D
AA
M
DV
N
O
C
CV
N
O
C
S3
S
C2
S
C1
S
C0
S
C
Table IV. ADCCON2 SFR Bit Designations
L
ocation
Name
Description
ADCCON2.7 ADCI
The ADC interrupt bit (ADCI) is set by hardware at the end of a single ADC conversion cycle or at the
end of a DMA block conversion. ADCI is cleared by hardware when the PC vectors to the ADC Interrupt
Service Routine.
ADCCON2.6 DMA
The DMA mode enable bit (DMA) is set by the user to enable a preconfigured ADC DMA mode operation.
A more detailed description of this mode is given in the ADC DMA Mode section.
ADCCON2.5 CCONV
The continuous conversion bit (CCONV) is set by the user to initiate the ADC into a continuous mode
of conversion. In this mode, the ADC starts converting based on the timing and channel configuration
already set up in the ADCCON SFRs; the ADC automatically starts another conversion once a previous
conversion has completed.
ADCCON2.4 SCONV
The single conversion bit (SCONV) is set to initiate a single conversion cycle. The SCONV bit is
automatically reset to “0” on completion of the single conversion cycle.
ADCCON2.3 CS3
The channel selection bits (CS3–0) allow the user to program the ADC channel selection under
ADCCON2.2 CS2
software control. When a conversion is initiated, the channel converted will be the one pointed to by
ADCCON2.1 CS1
these channel selection bits. In DMA mode, the channel selection is derived from the channel ID
ADCCON2.0 CS0
written to the external memory.
CS3 CS2 CS1 CS0 CH#
00000
00011
00102
00113
01004
01015
01106
01117
1000
Temp Sensor
1111
DMA STOP
All other combinations reserved.
ADCCON3—(ADC Control SFR #3)
The ADCCON3 register gives user software an indication of ADC busy status.
SFR Address
F5H
SFR Power-On Default Value
00H
Y
S
U
BD
V
S
RD
V
S
RD
V
S
RD
V
S
RD
V
S
RD
V
S
RD
V
S
R
Table V. ADCCON3 SFR Bit Designations
Bit Location
Bit Status
Description
ADCCON3.7 BUSY
The ADC busy status bit (BUSY) is a read-only status bit that is set during a valid ADC conversion
or calibration cycle. BUSY is automatically cleared by the core at the end of conversion or calibration.
ADCCON3.6 RSVD
ADCCON3.0–3.6 are reserved (RSVD) for internal use. These bits will read as “0” and should only
ADCCON3.5 RSVD
be written as “0” by user software.
ADCCON3.4 RSVD
ADCCON3.3 RSVD
ADCCON3.2 RSVD
ADCCON3.1 RSVD
ADCCON3.0 RSVD
F
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