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ADPD188GG 数据表(PDF) 46 Page - Analog Devices

部件名 ADPD188GG
功能描述  Integrated Optical Module with Ambient Light Rejection and Two LEDs
PDF  61 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADPD188GG 数据表(HTML) 46 Page - Analog Devices

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ADPD188GG
Data Sheet
Rev. B | Page 46 of 61
LED CONTROL REGISTERS
Table 27. LED Control Registers
Address
Data Bit
Default
Value
Access
Name
Description
0x14
[15:12]
0x0
R/W
Reserved
Write 0x0 to these bits for proper operation.
[11:8]
0x5
R/W
SLOTB_PD_SEL
PDx connection selection for Time Slot B. See the Time Slot Switch
section for detailed descriptions.
[7:4]
0x4
R/W
SLOTA_PD_SEL
PDx connection selection for Time Slot A. See the Time Slot Switch
section for detailed descriptions.
[3:2]
0x0
R/W
SLOTB_LED_SEL
Time Slot B LED configuration. These bits determine which LED is
associated with Time Slot B.
0x0: pulse PDx connection to AFE. Float mode and pulse connect
mode enable.
0x1: LEDX1 pulses during Time Slot B.
0x2: LEDX2 pulses during Time Slot B.
0x3: LEDX3 pulses during Time Slot B.
[1:0]
0x1
R/W
SLOTA_LED_SEL
Time Slot A LED configuration. These bits determine which LED is
associated with Time Slot A.
0x0: pulse PDx connection to AFE. Float mode and pulse connect
mode enable.
0x1: LEDX1 pulses during Time Slot A.
0x2: LEDX2 pulses during Time Slot A.
0x3: LEDX3 pulses during Time Slot A.
0x22
[15:14]
0x0
R/W
Reserved
Write 0x0.
13
0x1
R/W
ILED3_SCALE
LEDX3 current scale factor.
1: 100% strength.
0: 10% strength; sets the LEDX3 driver in low power mode.
LEDX3 Current Scale = 0.1 + 0.9 × (Register 0x22, Bit 13).
12
0x1
R/W
Reserved
Write 0x1.
[11:7]
0x0
R/W
Reserved
Write 0x0.
[6:4]
0x0
R/W
ILED3_SLEW
LEDX3 driver slew rate control. The slower the slew rate, the safer
the performance in terms of reducing the risk of overvoltage of the
LED driver.
0x0: the slowest slew rate.
…
0x7: the fastest slew rate.
[3:0]1
0x0
R/W
ILED3_COARSE
LEDX3 coarse current setting. Coarse current sink target value of
LEDX3 in standard operation.
0x0: lowest coarse setting.
…
0xF: highest coarse setting.
LED3PEAK = LED3COARSE × LED3FINE × LED3SCALE
where:
LED3PEAK
is the LEDX3 peak target value (mA).
LED3COARSE
= 44.5 + 17.8 × (Register 0x22, Bits[3:0]).
LED3FINE
= 0.73 + 0.022 × (Register 0x25, Bits[15:11]).
LED3SCALE
= 0.1 + 0.9 × (Register 0x22, Bit 13).
0x23
[15:14]
0x0
R/W
Reserved
Write 0x0.
13
0x1
R/W
ILED1_SCALE
LEDX1 current scale factor.
1: 100% strength.
0: 10% strength; sets the LEDX1 driver in low power mode.
LEDX1 Current Scale = 0.1 + 0.9 × (Register 0x23, Bit 13).
12
0x1
R/W
Reserved
Write 0x1.
[11:7]
0x0
R/W
Reserved
Write 0x0.



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