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參數資料
| 型號： | MCM20014 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 1/3” Color VGA Digital Image Sensor |
| 中文描述： | 1 / 3“彩色VGA數碼圖像傳感器 |
| 文件頁數： | 24/54頁 |
| 文件大小： | 761K |
| 代理商： | MCM20014 |
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MOTOROLA
MCM20014
24
5.1.3 Analog Control Registers
The Analog Register Block also contains a
Power Con-
figuration Register; Table 14
, and a
Reset Control Reg-
ister; Table 15
.
The
Power Configuration Register
controls the internal
analog functionality that directly effect power consump-
tion of the device. An external precision resistor pin is
available on the MCM20014 that may be used to more
accurately regulate the internal current sources. This
serves to minimize variations in power consumption that
are caused by variations in internal resistor values as
well as offer a method to reduce the power consumption
of the device. The default for this control uses the inter-
nally provided resistor which is nominally 12.5k
. This
feature is enabled by setting the
res
bit of the
Power
Configuration Register
and placing a resistor between
the pin; EXTRES, and ground.
Figure 14
depicts the
power savings that can be achieved with an external re-
sistor at a specific clock rate. Power is further reduced
at lower clock rates.
The databus output; ADC[9:0], is tristated using the
Power Configuration Register
by setting the
dbt
bit.
The MCM20014 is put into a standby mode via the I
2
C
interface by setting the
sby
bit of the
Power Configura-
tion Register
.
Address
0B
h
Voltage Reference
“
Positive
”
Code
Default
80
h
msb (7)
6
5
4
3
2
1
lsb (0)
prv[7]
prv[6]
prv[5]
prv[4]
prv[3]
prv[2]
prv[1]
prv[0]
Bit
Number
Function
Description
Reset
State
7 - 0
Reference
Voltage = 2.5 - (5mV * prv
d
)
10000000
b
(1.9V)
Table 13. Positive Voltage Reference Code Register
Address
0C
h
Power Configuration
Default
00
h
msb (7)
6
5
4
3
2
1
lsb (0)
x
res
fuo
fuo
fuo
fuo
dbt
sby
Bit
Number
Function
Description
Reset
State
7
Unused
Unused
x
6
Int/Ext
Resistor
0
b
= Internal Resistor
1
b
= External Resistor
0
b
5 - 2
FUO
Factory Use Only
0000
b
1
Tristate
Enable
0
b
= Output Data Bus enabled
1
b
= Output Data Bus in Tristate
0
b
0
Software
Standby
0
b
= Soft Standby inactive
1
b
= Soft Standby active
0
b
Table 14. Power Configuration Register
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