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参数资料
| 型号： | P83C266BDR |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Microcontrollers for PAL/SECAM TV with OSD and VST |
| 中文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, PLASTIC, SDIP-42 |
| 文件页数： | 45/92页 |
| 文件大小： | 382K |
| 代理商： | P83C266BDR |
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1999 Mar 10
45
Philips Semiconductors
Product specification
Microcontrollers for PAL/SECAM TV
with OSD and VST
P8xCx66 family
16.1
ADC Control Register 1 (SAD)
Table 44
ADC Control Register 1 (SFR address C8H)
Table 45
Description of SAD bits
Table 46
ADC input channel selection
16.2
ADC Control Register 2 (SAD2)
Table 47
ADC Control Register 2 (SFR address CAH)
Table 48
Description of SAD2 bits
7
6
5
4
3
2
1
0
VHI
CH1
CH0
ST
SAD3
SAD2
SAD1
SAD0
BIT
SYMBOL
DESCRIPTION
7
VHI
Compare result.
If VHI = 0, then the ADC input voltage is lower than the reference
voltage. If VHI = 1, then the ADC input voltage is higher than the reference voltage.
ADC input channel selection.
These 2 bits select the ADC channel, see Table 46.
6
5
4
CH1
CH0
ST
Start voltage comparison.
If ST = 0, voltage comparison is disabled. If ST = 1, a
voltage comparison is started.
Reference voltage level selection.
These 4 bits are used to select the analog output
voltage (V
ref
) of the 4-bit DAC. V
ref
is calculated as shown below.
3
2
1
0
SAD3
SAD2
SAD1
SAD0
CH1
CH0
CHANNEL SELECTED
0
0
1
1
0
1
0
1
Reserved.
Input channel ADC0 selected.
Input channel ADC1 selected.
Input channel ADC2 selected.
7
6
5
4
3
2
1
0
ADCE2
ADCE1
ADCE0
BIT
SYMBOL
ADCE2
DESCRIPTION
7 to 3
2
These 5 bits are not used.
ADC2 input select.
If ADC2 = 1, then pin 11 is selected as the ADC2 input. If
ADC2 = 0, then pin 11 is selected as the open-drain bidirectional port line P3.2.
ADC1 input select.
If ADC1 = 1, then pin 10 is selected as the ADC1 input. If
ADC2 = 0, then pin 10 is selected as the open-drain bidirectional port line P3.1.
ADC0 input select.
If ADC0 = 1, then pin 9 is selected as the ADC0 input. If ADC0 = 0,
then pin 9 is selected as the open-drain bidirectional port line P3.0.
1
ADCE1
0
ADCE0
V
ref
V
16
----------
SAD value
1
+
(
)
×
=
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