參數(shù)資料
型號(hào)： TSL2550
廠商： Electronic Theatre Controls, Inc.
英文描述： AMBIENT LIGHT SENSOR WITH SMBus INTERFACE
中文描述： 常溫與SMBus接口光傳感器
文件頁(yè)數(shù)： 8/14頁(yè)
文件大?。?/td> 147K
代理商： TSL2550
TSL2550
AMBIENT LIGHT SENSOR
WITH SMBus INTERFACE
TAOS029 – SEPTEMBER 2002
8
Copyright 2002, TAOS Inc.
The LUMENOLOGY Company
www.taosinc.com
Command Register
The command register contains eight bits as described in Table 1 and defaults to 0 (0x00) at power-up. A
command summary appears in Table 2.
Table 1. Command Register Data Format
RSEL
RESERVED
ADCEN
PON
B7
B6
B5
B4
B3
B2
B1
B0
RSEL2
RSEL1
RSEL0
0
0
0
ADCEN
PON
FIELD
BITS
DESCRIPTION
RSEL
7 to 5
Read Data Select. This field determines the data output by the TSL2550
during read.
Field Value
000
Read Value
Command register
010
ADC channel 0
100
ADC channel 1
RESERVED
4 to 2
Reserved for factory test. These bits should always be written to 0.
ADCEN
1
ADC Enable. This field actives the ADC. Writing a 1 activates the ADC.
Writing a 0 disables the ADC. ADCEN is normally used in conjunction with
PON.
Note:
Both ADCEN and PON must be asserted before the ADC channels will
operate correctly.
PON
0
Power ON. This field activates the internal oscillator to permit the timers and
ADC channels to operate. Writing a 1 activates the oscillator. Writing a 0
disables the oscillator. PON is normally used in conjunction with ADCEN.
Note:
For the Duration of writes and reads over the SMB interface, this bit is
overridden and the oscillator is enabled, independent of the state of PON.
Note:
Both ADCEN and PON must be asserted before the ADC channels will
operate correctly.
The command register is used primarily to select which register will be read during a read cycle (RSEL) and
to control the power consumption of the device (ADCEN and PON). When ADCEN and PON are high, the device
is in the full powered-up state and is fully operational. When ADCEN and PON are low, both the ADC and the
internal oscillator are powered down, resulting in minimum power consumption. Both ADCEN and PON should
always be asserted and de-asserted together The remaining bits (B4, B3, and B2) in the command register
should always be written 0. For details on using the command register, see the Operationsection, below.
Table 2. Command Summary
COMMAND
00h
FUNCTION
Place device in power-down state
03h
Read command register
43h
Read ADC Channel 0
83h
Read ADC Channel 1
相關(guān)PDF資料
PDF描述
TSL2560 LIGHT-TO-DIGITAL CONVERTER
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TSL2560T LIGHT-TO-DIGITAL CONVERTER
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參數(shù)描述
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