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ISL29010IROZ-EVALZ 데이터시트(PDF) 5 Page - Intersil Corporation

부품명 ISL29010IROZ-EVALZ
상세설명  Light-to-Digital Output Sensor with High Sensitivity, Gain Selection, and I2C Interface
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제조업체  INTERSIL [Intersil Corporation]
홈페이지  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

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5
FN6414.0
February 13, 2008
Register Set
There are eight registers that are available in the ISL29010. Table 1 summarizes the available registers and their functions.
Command Register 00(hex)
The Read/Write command register has five functions:
1. Enable; Bit 7.This function either resets the ADC or
enables the ADC in normal operation. A logic 0 disables
ADC to reset-mode. A logic 1 enables ADC to normal
operation.
2. ADCPD; Bit 6. This function puts the device in a
power-down mode. A logic 0 puts the device in normal
operation. A logic 1 powers down the device.
3. Timing Mode; Bit 5. This function determines whether the
integration time is done internally or externally. In Internal
Timing Mode, integration time is determined by an
internal dual speed oscillator (fOSC), and the n-bit
(n = 4, 8, 12, 16) counter inside the ADC. In External
Timing Mode, integration time is determined by the time
between three consecutive external-sync sync_I2C
pulses commands.
4. Photodiode Select Mode; Bits 3 and 2. Setting Bit 3 and
Bit 2 to 1 and 0 enables ADC to give light count DATA
output.
* n = 4, 8, 12,16 depending on the number of clock cycles
function.
5. Width; Bits 1 and 0. This function determines the number
of clock cycles per conversion. Changing the number of
clock cycles does more than just change the resolution of
the device. It also changes the integration time, which is
the period the device’s analog-to-digital (A/D) converter
samples the photodiode current signal for a lux
measurement.
TABLE 1. REGISTER SET
ADDR
REG NAME
BIT
7
6
5
4
3
2
1
0
DEFAULT
00h
COMMAND
ADCE
ADCPD
TIMM
0
ADCM1
ADCM0
RES1
RES0
00h
01h
CONTROL
0
0
0
0
GAIN1
GAIN0
0
0
00h
04h
LSB
SENSOR
S7
S6
S5
S4
S3
S2
S1
S0
00h
05h
MSB
SENSOR
S15
S14
S13
S12
S11
S10
S9
S8
00h
06h
LSB TIMER
T7
T6
T5
T4
T3
T2
T1
T0
00h
07h
MSB TIMER
T15
T14
T13
T12
T11
T10
T9
T8
00h
TABLE 2. WRITE ONLY REGISTERS
ADDRESS
REGISTER
NAME
FUNCTIONS/DESCRIPTION
b1xxx_xxxx
sync_I2C
Writing a logic 1 to this address bit
ends the current ADC-integration
and starts another. Used only with
External Timing Mode.
bx1xx_xxxx
clar_int
Writing a logic 1 to this address bit
clears the interrupt.
TABLE 3. ENABLE
BIT 7
OPERATION
0
Disable ADC-core to reset-mode (default)
1
Enable ADC-core to normal operation
TABLE 4. ADCPD
BIT 6
OPERATION
0
Normal operation (default)
1
Power Down
TABLE 5. TIMING MODE
BIT 5
OPERATION
0
Internal Timing Mode. Integration time is internally
timed determined by fOSC, REXT, and number of
clock cycles.
1
External Timing Mode. Integration time is externally
timed by the I2C host.
TABLE 6. PHOTODIODE SELECT MODE; BITS 2 AND 3
BITS 3:2
MODE
0:0
Disable ADC
0:1
Disable ADC
1:0
Light count DATA output in signed (n - 1) bit *
1:1
No operation.
TABLE 7. WIDTH
BITS 1:0
NUMBER OF CLOCK CYCLES
0:0
216 = 65,536
0:1
212 = 4,096
1:0
28 = 256
1:1
24 = 16
ISL29010


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