Datasheet

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Data Sheet ADP8866

Rev. A | Page 45 of 52

Table 85.

Bit Name Bit No. Description

N/A 7 Reserved.

SCD9_HB [6:0]

Sink current for the even numbered pulses when heartbeat mode for this channel is enabled. Use the following DAC code schedule.

See Table 39 for a complete list of values.

DAC

Code

Current (mA)

(Full Scale = 25 mA)

LEVEL_SET = 000010

Current (mA)

(Full Scale =

12.5 mA)

LEVEL_SET = 001100

Current (mA)

(Full Scale =

8.25 mA)

LEVEL_SET = 010110

Current (mA)

(Full Scale =

6.25 mA)

LEVEL_SET = 100000

Current (mA)

(Full Scale =

5.0 mA)

LEVEL_SET =

101010

0x00 0.0 0.0 0.0 0.0 0.0

0x01 0.0016 0.0008 0.0005 0.0004 0.0003

0x02 0.0062 0.0031 0.0021 0.0016 0.0012

0x03 0.014 0.0070 0.0047 0.0035 0.0028

…

0x7F 25.0 12.5 8.33 6.25 5.0

Independent Sink 6 Off Timer—Even Heartbeat Pulses (OFFTIMER6_HB)—Register 0x31

Table 86. OFFTIMER6_HB Bit Map

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Reserved

SC6OFF_HB

Table 87.

Bit Name Bit No. Description

N/A 7 Reserved.

SC6OFF_HB [6:0] SC6 off time for the even numbered pulses when heartbeat mode for this channel is enabled. When the

SC6OFF_HB time is disabled, SC6 goes immediately from the even numbered on time to the odd numbered on

time. When the SC off time is set to any other value, the ISC turns off for the off time (per the following listed

times) and then turns on according to the SCON6_HB setting.

0000 = disabled

0000001 = 0.0 sec

0000010 = 0.1 sec.

0000011 = 0.2 sec.

…

1111110 = 12.5 sec.

1111111 = off

A disabled setting leaves the LED on. This is useful for setting up a blink sequence that runs once and then stays on.

Setting SCxOFF_HB to 0 seconds is not recommended if the SCFO_HB fade-out time is also set to 0 seconds.

Setting SCxOFF to off causes the LED to be held off indefinitely. This is useful for setting up a blink sequence that runs once and then goes to off.

Independent Sink 7 Off Timer—Even Heartbeat Pulses (OFFTIMER7_HB)—Register 0x32

Table 88. OFFTIMER7_HB Bit Map

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Reserved SC7OFF_HB