Datasheet
ADPD1080/ADPD1081 Data Sheet
Rev. B | Page 58 of 74
LED CONTROL REGISTERS
Table 37. 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] 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.
LED3
PEAK
= LED3
COARSE
× LED3
FINE
× LED3
SCALE
where:
LED3
PEAK
is the LEDX3 peak target value (mA).
LED3
COARSE
= 50.3 + 19.8 × (Register 0x22, Bits[3:0]).
LED3
FINE
= 0.74 + 0.022 × (Register 0x25, Bits[15:11]).
LED3
SCALE
= 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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